Headrest height adjustment and limiting mechanism and child safety seat

Abstract

This application discloses a headrest height adjustment mechanism and a child safety seat thereof, comprising: a seat body, a headrest, and a movable part. The headrest is movably connected to the seat body via the movable part. The movable part includes a paddle and a positioning part. The seat body also has a fixed plate. The headrest is located between the seat body and the fixed plate. An upper limit block is provided on the fixed plate. The paddle is movably disposed between the headrest and the fixed plate. The paddle has an upper locking block and a lower locking block. The upper locking block can move below the upper limit block to restrict the upward movement of the headrest. The seat body has a lower limit block that cooperates with the lower locking block. The lower locking block can move above the lower limit block to restrict the downward movement of the headrest. By setting up the headrest and the movable part, and by moving the paddle, the child safety seat can be positioned in different positions and adapted to the child safety seat's own seat belt or the car's seat belt, improving the adjustment accuracy and ease of use of the headrest height adjustment mechanism.

Description

Technical Field

[0001] This application relates to the field of child safety seat technology, and in particular to a headrest height adjustment limit mechanism and a child safety seat thereof. Background Technology

[0002] To ensure child safety while riding in a vehicle, child safety seats typically have headrests installed on the inside of the seat back. To accommodate children of different heights, these headrests are height-adjustable, allowing them to be raised or lowered for better head protection. However, currently available child safety seats lack clearly defined adjustment limits for the headrests, making it difficult for consumers to quickly and accurately position the headrest according to their child's height. This affects the precision of the adjustment and the ease of use of the child safety seat. Summary of the Invention

[0003] This application provides a headrest height adjustment limit mechanism and a child safety seat thereof, which can clearly indicate the headrest position corresponding to the child's height, thereby improving the adjustment accuracy and ease of use of the child safety seat.

[0004] In a first aspect, embodiments of this application provide a headrest height adjustment limit mechanism, comprising: a seat body, a headrest, and a movable part, wherein the headrest is movably connected to the seat body via the movable part; the movable part includes a paddle and a positioning part, the seat body is further provided with a fixed plate, the headrest is located between the seat body and the fixed plate, and the fixed plate is provided with an upper limit block; the paddle is movably disposed between the headrest and the fixed plate, and the paddle is provided with an upper locking block and a lower locking block, the upper locking block being movable below the upper limit block to restrict the headrest from moving upward; the seat body is provided with a lower limit block cooperating with the lower locking block, the lower locking block being movable above the lower limit block to restrict the headrest from moving downward; the positioning part includes a fixed rod and a linkage block, the seat body is provided with a plurality of slots cooperating with the fixed rod, and the linkage block driving the fixed rod into or away from the slots.

[0005] The headrest height adjustment limit mechanism of this application embodiment has at least the following beneficial effects: By setting a headrest and a movable part, the upper locking block can be moved below the upper limit block to limit the upward movement of the headrest, or the lower locking block can be moved above the lower limit block to limit the downward movement of the headrest, which can quickly and accurately indicate the headrest position corresponding to the child's height, improving the adjustment accuracy and ease of use of the headrest height adjustment limit mechanism; by setting a seat body and a headrest, the linkage block drives the fixing rod into the slot to stably fix the seat body and the headrest, preventing the headrest from loosening during use, improving the stability and service life of the headrest height adjustment limit mechanism; by moving the lever, the child safety seat can be in different positions and adapted to the child safety seat's own seat belt or the car seat belt, improving the ease of use of the headrest height adjustment limit mechanism.

[0006] In some embodiments, the headrest is provided with a sliding groove that mates with the paddle, one side of the sliding groove has a notch that mates with the upper locking block, and the bottom of the sliding groove has a through hole that mates with the lower locking block. By providing the sliding groove, the upper locking block can move below the upper limit block through the notch, and the lower locking block can move above the lower limit block through the through hole, ensuring the positioning accuracy of the paddle and preventing the paddle from not moving into place, thus ensuring the positioning accuracy of the headrest height adjustment limit mechanism.

[0007] In some embodiments, a pressure block is further provided between the paddle and the headrest, and a positioning block that cooperates with the pressure block is provided on the side of the lower locking block. By setting the pressure block and the positioning block, the paddle can move to both sides of the pressure block through the positioning block, thereby accurately controlling the position of the upper and lower locking blocks, quickly and stably switching between different adjustment ranges of the headrest, and improving the adjustment accuracy and ease of use of the headrest height and low limit mechanism.

[0008] In some embodiments, a spring is provided on the side of the pressure block away from the lever, with the two ends of the spring respectively abutting the pressure block and the headrest. By providing the spring, the pressure block can remain in contact with the positioning block, allowing the pressure block to accurately determine the position of the lever, preventing the lever from shifting during use, and improving the structural stability of the headrest height adjustment limit mechanism.

[0009] In some embodiments, the pressure block facing the paddle and the positioning block are both triangular. This structure ensures that the pressure block and the positioning block can move and position flexibly and quickly, reducing wear on the paddle during use and increasing the service life of the headrest height adjustment limit mechanism.

[0010] In some embodiments, the upper and lower ends of the paddle are provided with buckles, and the slide groove is provided with a track; the paddle is inserted into the track through the buckles and is movably connected to the slide groove. By setting the buckles and the track, it is ensured that the paddle can be stably connected to the slide groove, avoiding the paddle from shifting or not moving into place, thus improving the adjustment accuracy and ease of use of the headrest height adjustment limit mechanism.

[0011] In some embodiments, the fixing rod is fixedly connected to the headrest via a bracket. The linkage block has C-shaped fasteners on both sides that mate with the fixing rod. Rotating the linkage block causes the C-shaped fasteners to push the fixing rod reciprocating on the bracket. By providing the bracket and C-shaped fasteners, the linkage block can stably drive the fixing rod to reciprocate within the slot, ensuring the structural stability and ease of adjustment of the headrest height adjustment limit mechanism.

[0012] In some embodiments, the slot is disposed between the bracket and the linkage block, and the C-buckle is located on both sides of the slot. This structure ensures that the linkage block can stably drive the fixed rod into or away from the slot, avoiding jamming between the fixed rod and the slot, and ensuring the structural stability of the headrest height adjustment limit mechanism.

[0013] In some embodiments, the paddle is provided with a protrusion, and indicator marks are provided on both sides of the protrusion. By providing the protrusion and indicator marks, the user can quickly move the paddle using the protrusion, and at the same time, the user can intuitively observe the position of the paddle, improving the ease of use of the headrest height adjustment limit mechanism.

[0014] Secondly, embodiments of this application provide a child safety seat, including a headrest height adjustment limit mechanism as described in the first aspect.

[0015] The headrest height adjustment limit mechanism and child safety seat of this application embodiment have at least the following beneficial effects: By setting a headrest and a movable part, the upper locking block can be moved below the upper limit block to limit the upward movement of the headrest, or the lower locking block can be moved above the lower limit block to limit the downward movement of the headrest, which can quickly and accurately indicate the headrest position corresponding to the child's height, improving the adjustment accuracy and ease of use of the headrest height adjustment limit mechanism; By setting a seat body and a headrest, the linkage block drives the fixing rod into the slot to stably fix the seat body and headrest, preventing the headrest from loosening during use, improving the stability and service life of the headrest height adjustment limit mechanism; By moving the lever, the child safety seat can be in different positions and adapted to the child safety seat's own seat belt or... The headrest height adjustment mechanism for automotive seat belts is improved for ease of use. A sliding groove allows the upper locking block to move through a notch below the upper limit block, and the lower locking block to move through a through-hole above the lower limit block, ensuring precise positioning of the paddle and preventing misalignment. A pressure block and positioning block allow the paddle to move to either side of the pressure block, precisely controlling the positions of the upper and lower locking blocks for quick and stable switching between different headrest adjustment ranges, further enhancing the accuracy and ease of use. A protrusion and indicator mark allow users to quickly move the paddle and visually observe its position, further improving the overall usability of the headrest height adjustment mechanism.

[0016] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the description and the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a headrest height adjustment limit mechanism provided in one embodiment of this application;

[0018] Figure 2 This is an exploded view of the headrest height adjustment limit mechanism provided in one embodiment of this application;

[0019] Figure 3 This is a cross-sectional view of a headrest height adjustment limit mechanism provided in one embodiment of this application;

[0020] Figure 4 yes Figure 2 Structural diagram of the center headrest and paddle shifters;

[0021] Figure 5 yes Figure 2 Enlarged view of the center paddle's structure;

[0022] Figure 6 yes Figure 2 Enlarged view of the center paddle's structure from another angle;

[0023] Figure 7 This is a schematic diagram of the headrest height adjustment limit mechanism provided in the embodiment of this application in the first position;

[0024] Figure 8 yes Figure 7 Enlarged view of section A;

[0025] Figure 9 This is a schematic diagram of the headrest height adjustment limit mechanism provided in the embodiment of this application in the second position;

[0026] Figure 10 for Figure 9 Enlarged view of section B in the middle. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various implementations. Simultaneously, the steps or actions described in the method description can be rearranged or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various orders in the specification and drawings are merely for the clear description of a particular embodiment and do not imply a mandatory order, unless otherwise stated that a particular order must be followed.

[0028] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0030] Reference Figures 1 to 10This utility model embodiment provides a headrest height adjustment limit mechanism, including: a seat body 100, a headrest 200, and a movable part 300. The headrest 200 is movably connected to the seat body 100 through the movable part 300. The movable part 300 includes a paddle 310 and a positioning part 320. A fixing plate 110 is also provided on the seat body 100. The headrest 200 is located between the seat body 100 and the fixing plate 110. An upper limit block 111 is provided on the fixing plate 110. The paddle 310 is movably disposed between the headrest 200 and the fixing plate 110. The seat body 100 is provided with an upper locking block 311 and a lower locking block 312. The upper locking block 311 can move below the upper limit block 111 to restrict the headrest 200 from moving upward. The seat body 100 is provided with a lower limit block 120 that cooperates with the lower locking block 312. The lower locking block 312 can move above the lower limit block 120 to restrict the headrest 200 from moving downward. The positioning part 320 includes a fixing rod 321 and a linkage block 322. The seat body 100 is provided with a plurality of slots 130 that cooperate with the fixing rod 321. The linkage block 322 drives the fixing rod 321 into or away from the slots 130.

[0031] By setting up the headrest 200 and the movable part 300, the upper locking block 311 can be moved below the upper limit block 111 to restrict the headrest 200 from moving upwards, or the lower locking block 312 can be moved above the lower limit block 120 to restrict the headrest 200 from moving downwards, by moving the lever 310. This can quickly and accurately indicate the headrest position corresponding to the child's height, improving the adjustment accuracy and ease of use of the headrest height adjustment limit mechanism. By setting up the seat body 100 and the headrest 200, the linkage block 322 drives the fixing rod 321 into the slot 130 to stably fix the seat body 100 and the headrest 200, preventing the headrest 200 from loosening during use, and improving the stability and service life of the headrest height adjustment limit mechanism.

[0032] In some embodiments, the headrest 200 is provided with a sliding groove 210 that mates with the paddle 310. One side of the sliding groove 210 is provided with a notch 211 that mates with the upper locking block 311, and the bottom of the sliding groove 210 is provided with a through hole 212 that mates with the lower locking block 312. By providing the sliding groove 210, the upper locking block 311 can move below the upper limit block 111 through the notch 211, and the lower locking block 312 can move above the lower limit block 120 through the through hole 212, ensuring the positioning accuracy of the paddle 310 and preventing the paddle 310 from not moving into place, thus ensuring the positioning accuracy of the headrest height adjustment limit mechanism.

[0033] In some embodiments, a pressure block 220 is provided between the paddle 310 and the headrest 200, and a positioning block 313 that cooperates with the pressure block 220 is provided on the side of the lower locking block 312. By setting the pressure block 220 and the positioning block 313, the paddle 310 can move to both sides of the pressure block 220 through the positioning block 313, thereby accurately controlling the position of the upper locking block 311 and the lower locking block 312, quickly and stably switching between different adjustment ranges of the headrest 200, and improving the adjustment accuracy and ease of use of the headrest adjustment height limit mechanism.

[0034] In some embodiments, a spring 230 is provided on the side of the pressure block 220 away from the lever 310, with the two ends of the spring 230 respectively abutting the pressure block 220 and the headrest 200. By providing the spring 230, the pressure block 220 can remain abutting the positioning block 313, allowing the pressure block 220 to accurately determine the position of the lever 310, preventing the lever 310 from shifting during use, and improving the structural stability of the headrest height adjustment limit mechanism.

[0035] In some embodiments, the side of the pressure block 220 facing the lever 310 and the positioning block 313 are both triangular. This structure ensures that the pressure block 220 and the positioning block 313 can move and be positioned flexibly and quickly, reducing the wear of the lever 310 during use and increasing the service life of the headrest height adjustment limit mechanism.

[0036] In some embodiments, the upper and lower ends of the paddle 310 are provided with buckles 314, and the slide groove 210 is provided with a track 213; the paddle 310 is inserted into the track 213 through the buckles 314 and is movably connected to the slide groove 210. By setting the buckles 314 and the track 213, it is ensured that the paddle 310 can be stably connected to the slide groove 210, avoiding the situation where the paddle 310 moves off-center or does not move into position, thereby improving the adjustment accuracy and ease of use of the headrest height adjustment limit mechanism.

[0037] In some embodiments, the fixed rod 321 is fixedly connected to the headrest 200 via a bracket 323. The linkage block 322 has C-shaped buckles 324 on both sides that cooperate with the fixed rod 321. By rotating the linkage block 322, the C-shaped buckles 324 push the fixed rod 321 to reciprocate on the bracket 323. By setting the bracket 323 and C-shaped buckles 324, the linkage block 322 can stably drive the fixed rod 321 to reciprocate on the slot 130, ensuring the structural stability and ease of adjustment of the headrest height adjustment limit mechanism.

[0038] In some embodiments, the slot 130 is disposed between the bracket 323 and the linkage block 322, and the C-buckle 324 is located on both sides of the slot 130. This structure ensures that the linkage block 322 can stably drive the fixing rod 321 into or away from the slot 130, avoiding the situation where the fixing rod 321 and the slot 130 get stuck, and ensuring the structural stability of the headrest height adjustment limit mechanism.

[0039] In some embodiments, the paddle 310 is provided with a protrusion 315, and indicator marks 316 are provided on both sides of the protrusion 315. By providing the protrusion 315 and indicator marks 316, the user can quickly move the paddle 310 through the protrusion 315, and at the same time, the user can intuitively observe the position of the paddle 310, thereby improving the ease of use of the headrest height adjustment limit mechanism. In practical applications, the indicator 316 can indicate the applicable height of children at the current position limited by the lever 310, such as ≥100cm, ≤105cm, etc. When the upper lever 311 moves below the upper limit block 111, the indicator 316 for ≤105cm is displayed, reminding the user that the headrest 200 is limited in upward movement at this time, that is, reminding the user that the current headrest height adjustment limit mechanism is suitable for children with a height of 105cm or less; when the lower lever 312 moves above the lower limit block 120, the indicator 316 for ≥100cm is displayed, reminding the user that the headrest 200 is limited in downward movement at this time, that is, reminding the user that the current headrest height adjustment limit mechanism is suitable for children with a height of 100cm or more.

[0040] In some embodiments, the headrest 200 is also provided with a label 240 that cooperates with the prompt sign 316. By moving the lever 310, the label 240 is aligned with the corresponding prompt sign 316, thereby prompting the user how to select the appropriate level for the child's height by moving the lever 310, so as to quickly and accurately determine the position of the headrest 200.

[0041] Embodiments of this application also provide a child safety seat, including the headrest height adjustment limit mechanism described above.

[0042] In the use of a child safety seat according to an embodiment of this application, the user moves the lever 310 via the protrusion 315, so that the indicator 316 corresponds to the child's height. For example, if the child's height is less than or equal to 105cm, the lever 310 is moved to the left, causing the positioning block 313 to move to the left and to the left side of the pressure block 220, so that the upper locking block 311 extends outside the notch 211. At this time, the upper locking block 311 can move below the upper limit block 111 and restrict the headrest 200 from moving upward. The structure of the pull rope or pull rod connected to the linkage block 322 drives the linkage block 322 to rotate. Rotating the linkage block 322 causes the C buckle 324 to push the fixing rod 321 away from the slot 130, so that the headrest 200 moves downward to the appropriate position. Then, the linkage block 322 is rotated in the opposite direction so that the C buckle 324 pushes the fixing rod 321 into the slot 130 to fix the position of the headrest 200. At this time, the headrest height adjustment limit mechanism is in the following position. Figure 7 and Figure 8 The first position is shown. In the first position, the highest point of the headrest 200 is where the upper locking block 311 is aligned with the upper limit block 111, reducing the adjustment range of the headrest 200 to prevent it from being too high and affecting the ease of adjustment of the child safety seat. At this time, since the child's height is less than or equal to 105cm, the highest position of the headrest 200 is limited, allowing the use of the child safety seat's built-in seat belt to ensure that the child is stably and comfortably secured to the seat body 100, improving the adjustment accuracy and ease of use of the child safety seat.

[0043] In another embodiment, when the child's height is greater than or equal to 100cm, the lever 310 is moved to the right, causing the positioning block 313 to move to the right and to the right side of the pressure block 220, so that the lower locking block 312 passes through the through hole 212. At this time, the lower locking block 312 can move above the lower limit block 120 and restrict the headrest 200 from moving downward. The linkage block 322 is rotated by the pull rope or pull rod connected to the linkage block 322. Rotating the linkage block 322 causes the C buckle 324 to push the fixing rod 321 away from the slot 130, so that the headrest 200 moves upward to the appropriate position. Then, the linkage block 322 is rotated in the opposite direction so that the C buckle 324 pushes the fixing rod 321 into the slot 130 to fix the position of the headrest 200. At this time, the headrest height adjustment limit mechanism is in the position of... Figure 9 and Figure 10The second position is shown. In the second position, the lowest position of the headrest 200 is where the lower locking block 312 is in contact with the lower limit block 120, reducing the adjustment range of the headrest 200 to prevent it from being too low and affecting the ease of adjustment of the child safety seat. At this time, since the child's height is greater than or equal to 100cm, the lowest position of the headrest 200 is limited. To avoid the built-in seat belt being too tight and affecting comfort, the car's seat belt can be used to ensure that the child is stably and comfortably fixed on the seat body 100, improving the adjustment accuracy and ease of use of the child safety seat.

[0044] The headrest height adjustment limit mechanism and child safety seat of this application embodiment, by setting a headrest 200 and a movable part 300, allows the upper locking block 311 to move below the upper limit block 111 to limit the upward movement of the headrest 200, or the lower locking block 312 to move above the lower limit block 120 to limit the downward movement of the headrest 200, by moving the lever 310. This can quickly and accurately indicate the headrest position corresponding to the child's height, improving the adjustment accuracy and ease of use of the child safety seat; by setting the seat body 100 and headrest 200, the linkage block 322 drives the fixing rod 321 into the slot 130 to stably fix the seat body 100 and headrest 200, preventing the headrest 200 from loosening during use, improving the stability and service life of the child safety seat; by moving the lever 310, the child safety seat can be in different positions and adapted to the child safety seat's own seat belt or the car seat belt, improving... The child safety seat offers several advantages. The sliding groove 210 allows the upper locking block 311 to move through the notch 211 to below the upper limit block 111, and the lower locking block 312 to move through the through hole 212 to above the lower limit block 120, ensuring the precise positioning of the lever 310 and preventing it from falling out of position. The pressure block 220 and positioning block 313 allow the lever 310 to move through the positioning block 313 to both sides of the pressure block 220, precisely controlling the positions of the upper and lower locking blocks 311 and 312. This enables quick and stable switching between different adjustment ranges of the headrest 200, improving the adjustment accuracy and ease of use of the child safety seat. The protrusion 315 and indicator 316 allow the user to quickly move the lever 310 via the protrusion 315, while also providing a clear view of the lever's position, further enhancing the child safety seat's usability.

[0045] In the several embodiments provided in this application, it should be understood that the disclosed systems, instruments, and methods can be implemented in other ways. For example, the instrument embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between instruments or units may be electrical, mechanical, or other forms. Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0046] The above is a detailed description of the preferred embodiments of this application. However, this application is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A headrest height adjustment limiting mechanism, characterized in that, include: The seat comprises a seat body, a headrest, and a movable part. The headrest is movably connected to the seat body via the movable part. The movable part includes a paddle and a positioning part. The seat body also has a fixed plate. The headrest is located between the seat body and the fixed plate. The fixed plate has an upper limit block. The paddle is movably disposed between the headrest and the fixed plate. The paddle has an upper locking block and a lower locking block. The upper locking block can move below the upper limit block to restrict the headrest from moving upward. The seat body has a lower limit block that cooperates with the lower locking block. The lower locking block can move above the lower limit block to restrict the headrest from moving downward. The positioning part includes a fixed rod and a linkage block. The seat body has multiple slots that cooperate with the fixed rod. The linkage block drives the fixed rod into or away from the slots.

2. The headrest height adjustment limiting mechanism according to claim 1, wherein The headrest is provided with a sliding groove that mates with the paddle, one side of the sliding groove is provided with a notch that mates with the upper locking block, and the bottom of the sliding groove is provided with a through hole that mates with the lower locking block.

3. The headrest height adjustment limiting mechanism of claim 2, wherein, A pressure block is provided between the paddle and the headrest, and a positioning block that cooperates with the pressure block is provided on the side of the lower locking block.

4. The headrest height adjustment limiting mechanism according to claim 3, wherein A spring is provided on the side of the pressure block away from the paddle, and the two ends of the spring are respectively attached to the pressure block and the headrest.

5. The headrest height adjustment limiting mechanism of claim 3, wherein The side of the pressure block facing the paddle and the positioning block are both triangular.

6. The headrest height adjustment limiting mechanism of claim 2, wherein The upper and lower ends of the paddle are provided with buckles, and the slide groove is provided with a track; the paddle is inserted into the track through the buckles and is movably connected to the slide groove.

7. The headrest height adjustment limiting mechanism of claim 1, wherein The fixing rod is fixedly connected to the headrest via a bracket. The linkage block has C-shaped buckles on both sides that cooperate with the fixing rod. By rotating the linkage block, the C-shaped buckles push the fixing rod to reciprocate on the bracket.

8. The headrest height adjustment limiting mechanism of claim 7, wherein, The slot is located between the bracket and the linkage block, and the C-shaped buckle is located on both sides of the slot.

9. The headrest height adjustment limiting mechanism of claim 1, wherein, The paddle has a protrusion, and there are indicator marks on both sides of the protrusion.

10. A child safety seat, characterized in that Includes the headrest height adjustment limit mechanism as described in any one of claims 1 to 9.

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