Child safety seat

Abstract

The present invention relates to a child safety seat, comprising a base and a seat, wherein the base is provided with pivotable support legs, and the backrest of the seat is provided with a height-adjustable headrest, the child safety seat also comprising a headrest limiting device, which is operably connected to the support legs; the headrest limiting device has a first locking member, which is in an extended state when the support legs are in an extended state so as to be able to engage 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 retracted state; and / or the headrest limiting device has a second locking member, which is in a retracted state when the support legs are in the extended state; and when the support legs are in the folded state, the second locking member is in an extended state so as to be able to engage with the headrest, thereby limiting the lower adjustment height of the headrest.

Description

Technical Field

[0001] The invention relates to a child safety seat. Background Art

[0002] Child safety seats are used in vehicles to make it easier for parents to travel with their children. Existing child safety seats are usually equipped with a headrest to support and protect the child's head. In order to make the headrest adaptable to children of different heights, the height of the headrest can be adjusted. The height adjustment range of the headrest is usually relatively large to meet the needs of children as they grow to different heights. If parents are not very proficient in the use of child safety seats, 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 young children, the headrest is not suitable for being adjusted above a certain height. Conversely, for older children, the headrest is not suitable for being adjusted below a certain height. Summary of the Invention

[0003] The present invention aims to provide a child safety seat to improve the operating difficulty of adjusting the height of a headrest of the child safety seat.

[0004] The child safety seat provided by the present invention comprises a base and a seat, the base being provided with pivotable support legs, and the backrest of the seat being provided with a height-adjustable headrest, the child safety seat also comprising a headrest limiting device, which is operably connected to the support legs; the headrest limiting device having a first locking member, which is in an extended state when the support legs are in an extended state so as to be able to engage 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 retracted state; and / or the headrest limiting device has a second locking member, which is in a retracted state when the support legs are in an extended state; and when the support legs are in a folded state, the second locking member is in an extended state so as to be able to engage with the headrest, thereby limiting the lower adjustment height of the headrest.

[0005] Furthermore, the headrest is arranged on the inner side of the backrest, and a blocking block is provided on the outer side of the backrest, wherein the blocking block is connected to the headrest and can move up and down with the headrest; the blocking block has an upper limit surface that can engage with the first locking member; and / or, the blocking block has a lower limit surface that can engage with the second locking member.

[0006] Furthermore, a track is provided on the outer side of the backrest and is slidably engaged with the blocking block.

[0007] Further, the headrest limiting device also includes: a first locking assembly, which includes: a first elastic return member, mounted on the backrest and connected to the first locking member; a first cable, a first end of which is connected to the first connection point of the support leg and a second end of which is operably connected to the first elastic return member; when the support leg is in the unfolded state, the first elastic return member maintains the first locking member in the extended state; when the support leg is in the retracted state, the first elastic return member is deformed by the force from the first cable, so that the first locking member switches from the extended state to the retracted state; and / or, a second locking assembly, which includes: a second elastic return member, mounted on the backrest and connected to the second locking member; a second cable, a first end of which is connected to the second connection point of the support leg and a second end of which is operably connected to the second elastic return member; when the support leg is in the retracted state, the second elastic return member maintains the second locking member in the extended state; when the support leg is in the unfolded state, the second elastic return member is deformed by the force from the second cable, so that the second locking member switches from the extended state to the retracted state.

[0008] Furthermore, the first elastic return member and the first locking member are integrally formed, and / or the second elastic return member and the second locking member are integrally formed.

[0009] Furthermore, the supporting leg is pivotally connected to the base via a pivot point; wherein, the first connection point is arranged at the top of the supporting leg, and the first connection point and the pivot point are separated by a first preset distance in the length direction of the supporting leg, and / or, the second connection point is arranged at the top of the supporting leg, and the second connection point and the pivot point are separated by a second preset distance in the length direction of the supporting leg.

[0010] Further, a first guide portion is provided at the front end of the base, and the first cable is engaged with the front end of the base through the first guide portion; the length of the first cable between the first guide portion and the first connection point is shorter when the support leg is in the extended state than when the support leg is in the retracted state; and / or, a second guide portion is provided at the front end of the base, and the second cable is engaged with the front end of the base through the second guide portion; the length of the second cable between the second guide portion and the second connection point is shorter when the support leg is in the retracted state than when the support leg is in the extended state.

[0011] Furthermore, the seat is pivotally connected to the base via a hollow rotating shaft, the first cable passes through the rotating shaft, and / or the second cable passes through the rotating shaft.

[0012] Furthermore, the seat is fixedly connected to the base, and a first guide structure and / or a second guide structure is provided at the bottom of the base. The first cable passes through the first guide structure, and the second cable passes through the second guide structure.

[0013] Furthermore, the first locking assembly also includes a first mounting seat, which is mounted on the backrest and has a first accommodating groove; the first elastic return member is located in the first accommodating groove, and the bottom of the first accommodating groove is provided with a first through hole for the first locking member to extend or retract; and / or, the second locking assembly also includes a second mounting seat, which is mounted on the backrest and has a second accommodating groove; the second elastic return member is located in the second accommodating groove, and the bottom of the second accommodating groove is provided with a second through hole for the second locking member to extend or retract.

[0014] Furthermore, the second end of the first cable is connected to a first drive pin, which is accommodated in the first accommodating groove and abuts against the first elastic return member; and / or the second end of the second cable is connected to a second drive pin, which is accommodated in the second accommodating groove and abuts against the second elastic return member.

[0015] Further, the groove wall of the first accommodating groove is provided with a first slide, and the first driving pin is slidably engaged with the first slide; and / or the groove wall of the second accommodating groove is provided with a second slide, and the second driving pin is slidably engaged with the second slide.

[0016] Furthermore, the first elastic return member is provided with a first opening, and the second end of the first cable is provided with a first connecting ring, the first connecting ring is located in the first opening and is sleeved on the first driving pin; and / or, the second elastic return member is provided with a second opening, and the second end of the second cable is provided with a second connecting ring, the second connecting ring is located in the second opening and is sleeved on the second driving pin.

[0017] Further, the first end of the first elastic return member is connected to the first mounting seat, the second end of the first elastic return member extends obliquely toward the bottom of the first accommodating groove, and the first locking member is located at the second end of the first elastic return member; and / or the first end of the second elastic return member is connected to the second mounting seat, the second end of the second elastic return member extends obliquely toward the bottom of the second accommodating groove, and the second locking member is located at the second end of the second elastic return member.

[0018] Furthermore, a height adjustment mechanism is provided between the backrest and the headrest, and the height adjustment mechanism allows the headrest to have an upper limit adjustment height and a lower limit adjustment height on the backrest; wherein the height value of the upper limit adjustment height is greater than the height value of the upper adjustment height, and / or the height value of the lower limit adjustment height is less than the height value of the lower adjustment height.

[0019] Furthermore, the headrest is provided with a shoulder strap hole and a seat belt pass; wherein, the lower limit adjustment height and the upper adjustment height correspond to the distance between the lower edge of the shoulder strap hole and the upper surface of the seat of the seat, and / or, the upper limit adjustment height and the lower adjustment height correspond to the distance between the lower edge of the seat belt pass and the upper surface of the seat of the seat.

[0020] In the child safety seat provided by the present invention, the headrest limit device can provide upward and / or downward adjustment height for the headrest through the first locking member and / or the second locking member according to the different working modes of the support legs (expanded or folded), thereby preventing parents from adjusting the headrest too high when a young child is riding in the child safety seat, or preventing parents from adjusting the headrest too low when an older child is riding in the child safety seat, effectively avoiding misuse of the headrest height, and helping to improve the safety and comfort of children when riding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A perspective view of a child safety seat according to an embodiment of the present invention is schematically shown, wherein the seat is mounted forwardly on a base with the support legs in an extended state;

[0022] Figure 2 A perspective view of a child safety seat according to an embodiment of the present invention is schematically shown, wherein the seat is mounted on the base in reverse and the support legs are in an extended state;

[0023] Figure 3 A perspective view schematically illustrates a seat, support legs, and headrest limiter of a child safety seat according to an embodiment of the present invention, wherein the seat is in a forward installation position and the support legs are in an extended state;

[0024] Figure 4 A perspective view schematically shows a support leg of a child safety seat according to an embodiment of the present invention;

[0025] Figure 5 A perspective view schematically illustrates a seat, support legs, and headrest limiter of a child safety seat according to an embodiment of the present invention, wherein the seat is in a forward installation position and the support legs are in a retracted state;

[0026] Figure 6 Schematically shows a rear perspective view of a child safety seat according to an embodiment of the present invention;

[0027] Figure 7 A partial longitudinal cross-sectional view of a child safety seat at a first locking assembly according to an embodiment of the present invention is schematically shown;

[0028] Figure 8 Schematically shows Figure 7 A magnified view of point A in the figure;

[0029] Figure 9 Schematically shows a first perspective view of a first locking assembly in a child safety seat according to an embodiment of the present invention;

[0030] Figure 10 A second perspective view schematically illustrates a first locking assembly in a child safety seat according to an embodiment of the present invention;

[0031] Figure 11 shows an exploded view of a first locking assembly of a child safety seat according to an embodiment of the present invention;

[0032] Figure 12 Schematically shows a partial longitudinal cross-sectional view of a child safety seat at a second locking assembly according to an embodiment of the present invention;

[0033] Figure 13 Schematically shows Figure 12 Enlarged view of point B in FIG.

[0034] Figure 14 A perspective view schematically shows a second locking assembly in a child safety seat according to an embodiment of the present invention;

[0035] Figure 15 Schematically shows an exploded view of a second locking assembly in a child safety seat according to an embodiment of the present invention;

[0036] Figure 16 Schematically illustrates the paths of the first and second cables of the child safety seat according to an embodiment of the present invention when the support legs are in the unfolded state and the seat is in the forward-facing installation state;

[0037] Figure 17 The figure schematically shows the adjustment position of the headrest in the child safety seat according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] See also Figure 1 、 Figure 2 and Figure 6 , shows the structure of a child safety seat 100 according to an embodiment of the present invention. Child safety seat 100 comprises a base 1 and a seat 2. In this embodiment, seat 2 is rotatably mounted on base 1, allowing seat 2 to have both a forward and reverse mounting position relative to base 1. Figure 1 A perspective view of the seat 2 mounted forwardly on the base 1 is shown. It can be understood that the face of a child sitting on the forward-mounted seat 2 faces forward. Figure 2 Shown is a perspective view in which the seat 2 is reversely mounted on the base 1. It is understood that the face of the child sitting on the reversely mounted seat 2 faces rearward. In other embodiments, the seat 2 may be fixedly mounted on the base 1 and may not rotate relative to the base 1.

[0039] It should be noted that, unless otherwise specified, the directional terms such as "front", "rear", "left", "right", "up" and "down" in this embodiment correspond to the "front", "rear", "left", "right", "up" and "down" directions of the vehicle. These directional terms are only used to make the description of the embodiments of the present invention clearer and are not used to improperly limit the scope of protection of the present invention.

[0040] The front end of the base 1 is provided with a pivotable support leg 11, see Figure 3 and Figure 4 The support leg 11 is pivotally connected to the base 1 via the pivot point 11a. The support leg 11 has an unfolded state relative to the base 1 ( Figure 1 ) and collapsed state ( Figure 5 The seat 2 has a seat 21 and a backrest 22. The backrest 22 is provided with a height-adjustable headrest 23 so that the headrest 23 can be adjusted according to the height of the child. For example, a height adjustment mechanism 4 can be provided between the backrest 22 and the headrest 23. The height adjustment mechanism 4 can adopt known technology. The height adjustment mechanism 4 allows the height of the headrest 23 on the backrest 22 to be adjusted (see Figure 17 The headrest 23's height adjustment (the distance between the headrest 23 and the upper surface of the seat 21) can be adjusted to accommodate changes in the child's height. As known in the art, the height adjustment mechanism 4 allows the headrest 23 to have an upper limit adjustment height H3 and a lower limit adjustment height H4, and can be fixed in any of a plurality of adjustment positions between the upper limit adjustment height H3 and the lower limit adjustment height H4. In other words, the height adjustment mechanism 4 provides the headrest 23 with a height adjustment range between H4 and H3.

[0041] See also Figure 1 、 Figure 5 and Figure 17It should be noted that for a child safety seat 100 designed to accommodate both smaller children (e.g., toddlers, ages 0-4) and older children (e.g., ages 3-12), the headrest 23 in the related art is equipped with a seatbelt pass-through 237 and a shoulder strap hole 236. The seatbelt pass-through 237 is located above the shoulder strap hole 236. When a smaller child is seated in the child safety seat 100 (e.g., when the support leg 11 needs to be unfolded), the child safety seat 100's seatbelt passes through the shoulder strap hole 236, securing the child within the child safety seat 100 with its own seatbelt. When an older child is seated in the child safety seat 100, the vehicle seat's seatbelt passes through the seatbelt pass-through 237 when engaging the child safety seat 100. With the shoulder strap hole 236 and the seatbelt pass-through 237, the vehicle seat's seatbelt provides reliable protection for the child in the child safety seat 100 without compromising the child's comfort.

[0042] It should be noted that in this field, when the headrest 23 is used for smaller children, the height of the headrest 23 generally refers to the distance between the lower edge of the shoulder strap hole 236 and the upper surface of the seat 21. It can be understood that the lower limit adjustment height H4, for example, refers to the closest distance between the lower edge of the shoulder strap hole 236 and the upper surface of the seat 21; when the headrest 23 is used for older children, the height of the headrest 23 generally refers to the distance between the lower edge of the seat belt pass 237 and the upper surface of the seat 21. It can be understood that the upper limit adjustment height H3, for example, refers to the farthest distance between the lower edge of the seat belt pass 237 and the upper surface of the seat 21.

[0043] The child safety seat 100 further includes a headrest limiting device 3 , which is operably connected to the support leg 11 . The headrest limiting device 3 has different working states according to changes in the working mode (expanded or folded) of the support leg 11 .

[0044] In this embodiment, see Figure 7 、 Figure 8 and Figure 17 The headrest limiting device 3 may include 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 to engage with the headrest 23, thereby limiting the upper adjustment height H1 of the headrest 23 (combined with the above content, the upper adjustment height H1 refers to, for example, the distance between the lower edge of the shoulder strap hole 236 and 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 retracted state. Figure 12 、 Figure 13 and Figure 17The headrest limiting device 3 may have a second locking member 302. When the support leg 11 is in the extended state, the second locking member 302 is in the retracted state. When the support leg 11 is in the folded state, the second locking member 302 is in the extended state so as to be able to engage with the headrest 23, thereby limiting the lower adjustment height H2 of the headrest 23 (combined with the above content, the lower adjustment height H2 refers to, for example, the distance between the lower edge of the seat belt passer 237 and the upper surface of the seat 21). It can be understood that the height value of the upper limit adjustment height H3 is greater than the height value of the upper adjustment height H1, and the height value of the upper adjustment height H1 is greater than the height value of the lower limit adjustment height H4; the height value of the lower limit adjustment height H4 is less than the height value of the lower adjustment height H2, and the height value of the lower adjustment height H2 is less than the height value of the upper limit adjustment height H3.

[0045] Generally, when the child safety seat 100 is supported by the support legs 11 (i.e., the support legs 11 are in an extended state when the child safety seat 100 is in use), it is more suitable for smaller children (infants), and in this case, the headrest 23 needs to be adjusted to a lower position range. When the child safety seat 100 is not supported by the support legs 11 (i.e., the support legs 11 are in a retracted state when the child safety seat 100 is in use), it is more suitable for older children, and in this case, the headrest needs to be adjusted to a higher position range.

[0046] In order to avoid misuse of the headrest 23 in different modes of the support leg 11 of the child safety seat 100, a headrest limiter 3 operably connected to the support leg 11 is provided in the embodiment of the present invention. In this way, when the support leg 11 is in the unfolded state for a child to sit on, the first locking member 301 of the headrest limiter 3 is in the extended state and the second locking member 302 is in the retracted state, thereby limiting the upper adjustment height H1 of the headrest 23 when the support leg 11 is in the unfolded state. The height adjustment range of the headrest 23 at this time is, for example, between H4 and H1 (for example, 274mm to 391mm). In this way, when a child sits in the child safety seat, parents are prevented from adjusting the headrest 23 too high and causing misuse of the headrest, thereby 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 limiter 3 is in the extended state and the first locking member 301 is in the retracted state, thus limiting the downward adjustment height H2 of the headrest 23 when the support legs 11 are in the folded state. The height adjustment range of the headrest 23 at this time is, for example, between H2 and H3 (for example, 324mm to 533mm). In this way, when an older child rides in the child safety seat, parents are prevented from adjusting the headrest 23 too low and causing misuse of the headrest, thereby improving the safety and comfort of the older child.

[0047] In the above embodiment, 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 pass 237 and the lower edge of the shoulder strap hole 236, and the height value of the upper adjustment height H1 is even greater than the height value of the lower adjustment height H2. That is, the position adjustment range of the headrest 23 may have overlapping adjustment ranges when the support legs 11 are in the extended state and when the support legs 11 are in the retracted state. In other embodiments ( Figure 17 ), the height difference HS between the upper adjustment height H1 and the lower adjustment height H2 can be equal to the height difference between the lower edge of the seat belt pass 237 and the lower edge of the shoulder belt hole 236, for example.

[0048] See also Figure 1 and Figure 6 The headrest 23 is provided on the inner side 221 of the backrest 22, and the outer side 222 of the backrest 22 is provided with a stop block 24. The stop block 24 is connected to the headrest 23 and can move up and down with the headrest 23. The stop block 24 can be detachably connected to the headrest 23 by a bolt (not numbered in the figure), and the outer side 222 of the backrest 22 can be provided with a track 2221, and the stop block 24 slides with the track 2221. The stop block 24 can have an upper limit surface 241 that can engage with the first locking member 301, and the stop block 24 can also have a lower limit surface 242 that can engage with the second locking member 302. In this way, the first locking member 301 and the second locking member 302 can indirectly engage with the headrest 23 through the stop block 24, thereby limiting the upper adjustment height H1 and the lower adjustment height H2 of the headrest 23. By providing a blocking block 24 on the outer side 222 of the backrest 22 that is linked to the headrest 23, the extension directions of the first locking member 301 and the second locking member 302 are both toward the direction away from the back of the child passenger. This, on the one hand, makes full use of the outer space of the backrest 22, and on the other hand, has little effect on the structure of the headrest 23 itself.

[0049] See also Figure 3 The headrest limiting device 3 may further include a first locking component 31 and a second locking component 32. Figures 7 to 11 A preferred embodiment of the first locking assembly 31 is shown. Figures 12 to 15 A preferred embodiment of the second locking assembly 32 is shown.

[0050] See also Figure 3 and Figure 4 、 Figures 7 to 11 、 Figure 16The first locking assembly 31 may include a first elastic return member 311 and a first cable 312. The first elastic return member 311 may be mounted on the backrest 22 and connected to the first locking member 301. The first elastic return member 311 may be, for example, an elastic sheet, such as made of metal, plastic, or other suitable materials. The first locking member 301 may be a locking pin, which may be attached together or integrally formed with the first elastic return member 311. The first cable 312 may be, for example, a steel wire, the first end 3121 of the first cable 312 being connected to the first connection point 111 of the support leg, and the second end 3122 being operably connected to the first elastic return member 311. It should be noted that the operable connection between the first cable 312 and the first elastic return member 311 may be a direct connection, an indirect connection, a direct conflict, an indirect conflict, etc., so that the active action of one of the first cable 312 and the first elastic return member 311 will trigger the passive action of the other.

[0051] By properly arranging the path of the first cable 312, the first locking assembly 31 can meet the following requirements: When the support leg 11 is in the extended state (as described above, this generally corresponds to the situation where a child is riding, and the headrest 23 needs to be positioned not too high), the first elastic return member 311 maintains the first locking member 301 in the extended state. When the headrest 23 moves upward from the bottom to the upper adjustment height H1, the first locking member 301 abuts against the upper limit surface 241, thereby restricting the headrest 23 from moving above the upper adjustment height H1. When the support leg 11 switches from the extended state to the retracted state, the support leg 11 pulls the first cable 312, and the first elastic return member 311 is elastically deformed by the force from the first cable 312. The elastic deformation of the first elastic return member 311 drives the first locking member 301 from the extended state to the retracted state, at which point the first locking member 301 no longer restricts the headrest 23 from moving above 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 return member 311 can pull the first cable 312 in the reverse direction under the action of the elastic restoring force, and carry the first locking member 301 back to the extended state.

[0052] See also Figure 3 and Figure 4 、 Figures 12 to 16The second locking assembly 32 may include a second elastic return member 321 and a second cable 322. The second elastic return member 321 may be mounted on the backrest 22 and connected to the second locking member 302. The second elastic return member 321 may be, for example, an elastic sheet, such as made of metal, plastic, or other suitable materials. The second locking member 302 may be a locking pin, which may be attached to or formed as a two-piece with the second elastic return member 321. The second cable 322 may be, for example, a steel wire, the first end 3221 of the second cable 322 being connected to the second connection point 112 of the support leg 11, and the second end 3222 being operably connected to the second elastic return member 321. It should be noted that the operable connection between the second cable 322 and the second elastic return member 321 may be a direct connection, an indirect connection, a direct conflict, an indirect conflict, etc., so that the active action of one of the second cable 322 and the second elastic return member 321 will trigger the passive action of the other.

[0053] By properly arranging the path of the second cable 322, the second locking assembly 32 can meet the following requirements: When the support leg 11 is in the folded state (as described above, this is generally necessary for larger children, where the headrest 23 must not be positioned too low), the second elastic return member 321 maintains the second locking member 302 in the extended state. When the headrest 23 moves downward from the top to the lower adjustment height H2, the second locking member 302 abuts the lower limit 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 extended state, the support leg 11 pulls the second cable 322, and the second elastic return member 321 elastically deforms due to the force from the second cable 322. This elastic deformation of the second elastic return member 321 causes the second locking member 302 to switch from the extended state to the retracted state, at which point the second locking member 302 no longer restricts the headrest 23 from moving below the lower adjustment height H2. It can be understood that when the support leg 11 switches from the extended state to the folded state, the second elastic return member 321 can pull the second cable 322 in the opposite direction under the action of the elastic restoring force, and carry the second locking member 302 back to the extended state.

[0054] See also Figures 3 to 5 In this embodiment, the first connection point 111 may be disposed at the top 110 of the support leg 11. The first connection point 111 may be separated from the pivot point 11a of the support leg 11 by a first predetermined distance L1 along the length direction L of the support leg 11. The second connection point 112 may be disposed at the top 110 of the support leg 11. The second connection point 112 may be separated from the pivot point 11a of the support leg 11 by a second predetermined distance L2 along the length direction L of the support leg 11. In some embodiments, the first predetermined distance L1 may be 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.

[0055] See also Figure 3 、 Figure 5 and Figure 16 In this embodiment, the first cable 312 and the second cable 322 can be configured as follows:

[0056] A first guide portion 101 is provided at the front end of the bottom of the base 1 (for ease of understanding, Figure 3 and Figure 5 (The base 1 is not shown in the figure), the first cable 312 is connected to the front end of the base 1 through the first guide portion 101. The first guide portion 101 is, for example, located behind the first connection point 111. The length of the first cable between the first guide portion 101 and the first connection point 111 is smaller when the support leg 11 is in the extended state and larger when the support leg 11 is in the retracted state. Figure 3 In FIG, S1 represents the length of the first cable between the first guide portion 101 and the first connection point 111 when the support leg 11 is in the unfolded state, Figure 5 In the figure, S2 represents the length of the first cable between the first guide portion 101 and the first connection point 111 when the support leg 11 is in the retracted state, and S1 is less than S2. The second end 3122 of the first cable 312 extends upward through the first guide portion 101 and the bottom of the base 1, and is connected to the first elastic return member 311.

[0057] A second guide portion 102 is provided at the front end of the bottom of the base 1. The second cable 322 is coupled to the front end of the base 1 via the second guide portion 102. The second guide portion 102 is, for example, located in front of the second connection point 112. The length of the second cable between the second guide portion 102 and the second connection point 112 is greater when the support leg 11 is in the extended state and is smaller when the support leg 11 is in the retracted state. Figure 3 In FIG, S3 represents the length of the second cable between the second guide portion 102 and the second connection point 112 when the support leg 11 is in the unfolded state, Figure 5 In the figure, S4 represents the length of the second cable between the second guide portion 102 and the second connection point 112 when the support leg 11 is in the retracted state, and S3 is greater than S4. The second end 3222 of the second cable 322 extends upward through the second guide portion 102 and the bottom of the base 1, and is connected to the second elastic return member 321.

[0058] See also Figure 6In this embodiment, the seat 2 is pivotally connected to the base 1 via a hollow rotating shaft 20, and the seat 2 can, for example, rotate 360 degrees. At this time, the second end 3122 of the first cable 312 can be passed through the center hole of the rotating shaft 10 and connected to the first elastic return member 311, and the second end 3222 of the second cable 322 can be passed through the center hole of the rotating shaft 20 and connected to the second elastic return member 321. In this way, whether the seat 2 is in the forward installation position or the reverse installation position, the first locking assembly 31 and the second locking assembly 32 can operate normally. Figure 16 In this embodiment, it can be seen that the first cable 312 and the second cable 322 are crossed in the rotating shaft 20, but in other embodiments, the first cable 312 and the second cable 322 can take other appropriate paths so that the first cable 312 and the second cable 322 do not cross each other.

[0059] See also Figures 8 to 11 In this embodiment, the first locking assembly 31 may further include a first mounting seat 331, which is mounted on the backrest 22 and has a first receiving groove 3310. The first elastic return member 311 is located in the first receiving groove 3310. The first elastic return member 311 is mounted to the backrest 22 via the first mounting seat 331 and is not easily interfered with by other components in the first receiving groove 3310. The bottom of the first receiving groove 3310 is provided with a first through hole 33101 for the first locking member 301 to extend or retract. It can be understood that when the first locking member 301 extends from the first through hole 33101, the first locking member 301 is in an extended state for engagement 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.

[0060] See also Figures 13 to 15 In this embodiment, the second locking assembly 32 may further include a second mounting base 332. The second mounting base 332 is mounted on the backrest 22 and has a second receiving slot 3320. The second elastic return member 321 is located in the second receiving slot 3320. The second elastic return member 321 is mounted to the backrest 22 via the second mounting base 332 and is not easily interfered with by other components in the second receiving slot 3320. The bottom of the second receiving slot 3320 is provided with a second through hole 33201 for the second locking member 302 to extend or retract. It will be understood that when the second locking member 302 extends from the second through hole 33201, the second locking member 302 is in an extended state, for engagement with the headrest 23 or the blocking block 24. When the second locking member 302 is retracted from the second through hole 33201, the second locking member 302 is in a retracted state.

[0061] This embodiment also shows a preferred operable connection mode between the first cable 312 and the first elastic return member 311 , and a preferred operable connection mode between the second cable 322 and the second elastic return member 321 .

[0062] See also Figure 10 and Figure 11 The second end 3122 of the first cable 312 can be connected to a first driving pin 341. The first driving pin 341 is received in the first receiving slot 3310 and abuts against the first elastic return member 311. When the support leg 11 switches from the deployed state to the retracted state, the first cable 312 drives the first elastic return member 311 to deform via the first driving pin 341, causing the first locking member 301 to retract from the first through hole 33101.

[0063] In some embodiments, the wall of the first receiving groove 3310 may be provided with a first slide 33102, and the first driving pin 341 slides in cooperation with the first slide 33102. The first slide 33102 is, for example, an elongated hole, and the stroke provided by the first slide 33102 to the first driving pin 341 is, for example, equal to the difference between S1 and S2. Figure 8 When the support leg 11 switches from the deployed state to the retracted state, the first cable 312 pulls the first drive pin 341 along the first slideway 33102 to the lower right. During this movement, the first drive pin 341 applies force to the first elastic return member 311, causing the first locking member 301 to move to the upper right and retract from the first through hole 33101. Thus, when the support leg 11 of the child safety seat is retracted to accommodate an older child, the first locking member 301 no longer restricts the upward movement of the headrest 23.

[0064] In some embodiments, a first opening 3110 may be provided in the middle of the first elastic return member 311 , and a first connecting ring 31220 may be provided at the second end 3122 of the first cable 312 . The first connecting ring 31220 is located in the first opening 3110 and is sleeved on the first driving pin 341 .

[0065] In some embodiments, the first end 3111 of the first elastic return member 311 is, for example, riveted or welded to the first mounting seat 331, and the second end 3112 of the first elastic return member 311 extends obliquely toward the bottom of the first accommodating groove 3310, thereby having an inclined surface. The first locking member 301 is located at the second end 3112 of the first elastic return member 311. In this way, when the tension exerted on the first drive pin 341 by the first cable 312 is greater than the pressure exerted by the first elastic return member 311, the first drive pin 341 slides in the first slide 33102 while pushing the inclined surface of the first elastic return member 311 to elastically deform, causing the first locking member 301 to retract from the first through hole 33101. When the tension on the first driving pin 341 from the first cable 312 is less than the pressure from the first elastic return member 311, the inclined surface of the first elastic return member 311 drives the first driving pin 341 to slide in the first slide 33102 in the opposite direction, and the first locking member 301 extends from the first through hole 33101.

[0066] See also Figure 15 The second end 3222 of the second cable 322 can be connected to a second driving pin 342. The second driving pin 342 is received in the second receiving slot 3320 and abuts against the second elastic return member 321. When the support leg is switched from the folded state to the extended state, the second cable 322 drives the second elastic return member 321 to deform via the second driving pin 342, causing the second locking member 302 to retract from the second through hole 33201.

[0067] In some embodiments, the wall of the second receiving groove 3320 may be provided with a second slide 33202, and the second driving pin 342 slides in cooperation with the second slide 33202. The second slide 33202 is, for example, an elongated hole, and the stroke provided by the second slide 33202 to the second driving pin 342 is, for example, equal to the difference between S3 and S4. Figure 13 When the support leg 11 switches from the folded state to the unfolded state, the second cable 322 pulls the second driving pin 342 to move downward and rightward along the second slideway 33202. During this movement, the second driving pin 342 applies force to the second elastic return member 321, causing the second locking member 302 to move upward and rightward, thereby retracting from the second through hole 33201. Thus, when the support leg 11 of the child safety seat is unfolded to accommodate a small child, the second locking member 302 no longer restricts the downward movement of the headrest 23.

[0068] In some embodiments, a second opening 3210 may be provided in the middle of the second elastic return member 321 , and a second connecting ring 32220 may be provided at the second end 3222 of the second cable 322 . The second connecting ring 32220 is located in the second opening 3210 and is sleeved on the second driving pin 342 .

[0069] In some embodiments, the first end 3211 of the second elastic return member 321 is, for example, riveted or welded to the second mounting seat 332, and the second end 3212 of the second elastic return member 321 extends obliquely toward the bottom of the second accommodating groove 3320, thereby having an inclined surface. The second locking member 302 is located at the second end 3212 of the second elastic return member 321. Thus, when the tension exerted on the second drive pin 342 by the second cable 322 is greater than the pressure exerted on the second elastic return member 321, the second drive pin 342 slides in the second slideway 33202 while pushing the inclined surface of the second elastic return member 321 to elastically deform, causing the second locking member 302 to retract from the second through hole 33201. When the tension on the second driving pin 342 from the second cable 322 is less than the pressure from the second elastic return member 321, the inclined surface of the second elastic return member 321 drives the second driving pin 342 to slide in the second slide 33202, and the second locking member 302 extends from the second through hole 33201.

[0070] The first mounting seat 331 and the second mounting seat 332 may be disposed at intervals on the left and right sides of the middle portion of the backrest 22 .

[0071] It should be noted that, although in the present embodiment, the headrest limit device 3 includes both the first locking member 301 and the second locking member 302, in actual application, the headrest limit device 3 may include only one of the first locking member 301 and the second locking member 302. It can be understood that only one of the first locking component 31 and the second locking component 32 associated with the first locking member 301 and the second locking member 302 can be set accordingly.

[0072] It is understandable that the headrest limiting device 3 and its first locking assembly 31 and second locking assembly 32 may have various implementations in other embodiments, and are not limited to the above examples, as long as the purpose of the invention can be achieved.

[0073] It should be noted that, although in the above embodiment, the first locking member 301 and the second locking member 302 limit the upward and downward movement of the headrest 23 by abutting against the blocking block 24, it can be understood that 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 the headrest 23 to limit the upward and downward movement of the headrest 23.

[0074] It should be noted that, although the above embodiment is described using the child safety seat 100 in which the seat 2 is pivotally connected to the base 1 as an example, it is understood that in other embodiments not shown, the headrest limit device 3 of the embodiment of the present invention can also be applied to the child safety seat 100 in which the seat 2 is fixedly connected to the base 1. In this case, a first guide structure and / or a second guide structure (not shown) can be provided at the bottom of the base 1, and the second end 3122 of the first cable 312 passes through the first guide structure and is guided by the first guide structure, and then is operably connected to the first elastic return member 311 upwardly. The second end 3222 of the second cable 322 passes through the second guide structure and is guided by the second guide structure, and then is operably connected to the second elastic return member 321 upwardly.

[0075] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A child safety seat comprising a base and a seat, wherein the base is provided with pivotable support legs, and the backrest of the seat is provided with a height-adjustable headrest, characterized in that: The child safety seat further comprises a headrest limiter, said headrest limiter being operably connected to said support leg; The headrest limiting device has a first locking member, and when the support legs are in the unfolded state, the first locking member is in the extended state so as to be able to engage with the headrest, thereby limiting the upward adjustment height of the headrest; When the supporting leg is in the folded state, the first locking member is in the retracted state; And / or, the headrest limiting device has a second locking member, which is in a retracted state when the support legs are in the extended state; and the second locking member is in an extended state when the support legs are in the folded state so as to be able to engage with the headrest, thereby limiting the downward adjustment height of the headrest; The child safety seat further includes a height adjustment mechanism disposed between the backrest and the headrest, wherein the height adjustment mechanism allows the headrest to have an upper limit adjustment height and a lower limit adjustment height on the backrest.

2. The child safety seat according to claim 1, characterized in that: The headrest is arranged on the inner side of the backrest, and a blocking block is arranged on the outer side of the backrest. The blocking block is connected to the headrest and can move up and down with the headrest; The blocking block has an upper limit surface capable of engaging with the first locking member; and / or the blocking block has a lower limit surface capable of engaging with the second locking member.

3. The child safety seat according to claim 2, characterized in that: The outer side of the backrest is provided with a track which is slidably matched with the blocking block.

4. The child safety seat according to any one of claims 1 to 3, characterized in that: The headrest limiting device further includes: A first locking assembly, comprising: a first elastic return member mounted on the backrest and connected to the first locking member; a first cable having a first end connected to a first connection point of the support leg and a second end operably connected to the first elastic return member; when the support leg is in an extended state, the first elastic return member maintains the first locking member in an extended state; when the support leg is in a retracted state, the first elastic return member is deformed by a force from the first cable, causing the first locking member to switch from the extended state to the retracted state; and / or, The second locking assembly includes: a second elastic return member, which is installed on the backrest and connected to the second locking member; a second cable, a first end of which is connected to the second connection point of the support leg, and a second end of which is operably connected to the second elastic return member; when the support leg is in a folded state, the second elastic return member keeps the second locking member in an extended state; when the support leg is in an unfolded state, the second elastic return member is deformed by the force from the second cable, so that the second locking member switches from an extended state to a retracted state.

5. The child safety seat according to claim 4, characterized in that: The first elastic return member and the first locking member are integrally formed, and / or the second elastic return member and the second locking member are integrally formed.

6. The child safety seat according to claim 4, characterized in that: The support legs are pivotally connected to the base via a pivot point; Wherein, the first connection point is arranged at the top of the supporting leg, and the first connection point and the pivot point are separated by a first preset distance in the length direction of the supporting leg, and / or the second connection point is arranged at the top of the supporting leg, and the second connection point and the pivot point are separated by a second preset distance in the length direction of the supporting leg.

7. The child safety seat according to claim 6, characterized in that: The front end of the base is provided with a first guide portion, and the first cable is connected to the front end of the base through the first guide portion; the length of the first cable between the first guide portion and the first connection point is shorter when the support leg is in the extended state than when the support leg is in the retracted state; and / or, A second guide portion is provided at the front end of the base, and the second cable is engaged with the front end of the base through the second guide portion; the length of the second cable between the second guide portion and the second connection point is shorter when the support leg is in the retracted state than when the support leg is in the unfolded state.

8. The child safety seat according to claim 4, characterized in that: The seat is pivotally connected to the base via a hollow rotating shaft, the first cable passes through the rotating shaft, and / or the second cable passes through the rotating shaft.

9. The child safety seat according to claim 4, characterized in that: The seat is fixedly connected to the base, and a first guide structure and / or a second guide structure is provided at the bottom of the base. The first cable passes through the first guide structure, and the second cable passes through the second guide structure.

10. The child safety seat according to claim 4, characterized in that: The first locking assembly further includes a first mounting seat, which is mounted on the backrest and has a first receiving groove; the first elastic return member is located in the first receiving groove, and the bottom of the first receiving groove is provided with a first through hole for the first locking member to extend or retract; and / or, The second locking assembly also includes a second mounting seat, which is mounted on the backrest and has a second accommodating groove; the second elastic return member is located in the second accommodating groove, and the bottom of the second accommodating groove is provided with a second through hole for the second locking member to extend or retract.

11. The child safety seat according to claim 10, characterized in that: The second end of the first cable is connected to a first driving pin, which is accommodated in the first accommodating groove and abuts against the first elastic return member; and / or, The second end of the second cable is connected to a second driving pin, which is accommodated in the second accommodating groove and abuts against the second elastic return member.

12. The child safety seat according to claim 11, characterized in that: The groove wall of the first accommodating groove is provided with a first slideway, and the first driving pin is slidably engaged with the first slideway; and / or, The groove wall of the second accommodating groove is provided with a second slideway, and the second driving pin is slidably engaged with the second slideway.

13. The child safety seat according to claim 11, characterized in that The first elastic return member is provided with a first opening, and the second end of the first cable is provided with a first connecting ring, the first connecting ring is located in the first opening and is sleeved on the first driving pin; and / or, The second elastic return member is provided with a second opening, and the second end of the second cable is provided with a second connecting ring. The second connecting ring is located in the second opening and is sleeved on the second driving pin.

14. The child safety seat according to claim 11, characterized in that The first end of the first elastic reset member is connected to the first mounting seat, the second end of the first elastic reset member extends obliquely toward the bottom of the first accommodating groove, and the first locking member is located at the second end of the first elastic reset member; and / or, The first end of the second elastic return member is connected to the second mounting seat, the second end of the second elastic return member extends obliquely toward the bottom of the second accommodating groove, and the second locking member is located at the second end of the second elastic return member.

15. The child safety seat according to claim 14, characterized in that: The headrest is provided with a shoulder belt hole and a safety belt pass-through; Wherein, the lower limit adjustment height and the upper adjustment height correspond to the distance between the lower edge of the shoulder strap hole and the upper surface of the seat of the seat, and / or, the upper limit adjustment height and the lower adjustment height correspond to the distance between the lower edge of the seat belt pass-through and the upper surface of the seat of the seat.

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