FIG. 22 shows a top partial perspective view of the support plate and the seat part according to another embodiment of the present disclosure.

FIG. 23 shows a cross-sectional view taken along a line “D-D” in FIG. 22.

FIG. 24 shows a perspective view of the support plate according to another embodiment of the present disclosure, in which the upper cover and a bottom plate are removed.

FIG. 25 shows another side cross-sectional view of the child safety seat according to another embodiment of the present disclosure.

List of Reference Numbers:

100
Support Plate

110
Body

110A
Upper Surface

110B
Lower Surface

110C
Through Hole

111
Limiting Rib

111A
Vertical Segment

120
First Sliding Element

130
First Locking Element

131
Engaging End

140
Operating Element

141
Pushing Rib

150
Reinforcing Tube

160
Elastic Element

200
Seat Part

210
Cover

211
Limiting Slot

211A
Blocking Part

220
Second Sliding Element

230
Second Locking Element

250
Connecting Hole

300
Support Plate

310
Body

311
Upper Cover

312
Lower Cover

312A
Window

313
Bottom Plate

313a
Extension

3131
Receiving Slot

320
Connecting Element

330
First Sliding Element

340
Support Plate Adjustment Mechanism

341
Operating Element

342
Elastic Element

343
Positioning Structure

3431
First Locking Element

3432
Fixing Seat

3433
Return Spring

3434
Linkage Pin

3435
Inclined Slot

350
First Limiting Piece

400
Seat Part

401
Connecting Hole

402
Second Sliding Element

410A
Sliding Member

410B
Sliding Member

410C
Connecting Column

421
Unlocking Operating Member

422
Connecting Member

423
Reset Member

424
Angle Locking Structure

4241
Engaging Pin

4242
Engaging Reset Member

430
Positioning Slot

440
Second Limiting Piece

500
Base

510
Engaging Hole

520A
Sliding-fit Member

520B
Sliding-fit Member

DETAILED DESCRIPTION

Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. While the present disclosure may be modified or substituted in various forms, specific embodiments thereof are shown by way of examples in the accompanying drawings. However, the present disclosure should not be construed as limiting the embodiments as set forth herein, on the contrary, the present disclosure is intended to cover all modifications, equivalents, and alternatives within the spirit and scope of the present disclosure.

Hereinafter, the present disclosure will be described in detail with reference to the accompanying drawings.

In one embodiment of the present disclosure, a child safety seat is provided. Specifically, FIGS. 1, 2A and 2B show a child safety seat provided with a support plate 100 according to the present disclosure. The support plate 100 may be slidably connected to a seat part 200 of the child safety seat, for example, connected to a lower front side of the seat part 200, and may be slidable forward and rearward and be positioned between a retracted position shown in FIG. 1 and an extended position shown in FIG. 2A. Herein, a direction towards which the child safety seat faces may be defined as “front”, and a direction from which the child safety seat faces away may be defined as “rear”. The support plate 100 may slide forward and rearward along the seat part 200 and be positioned at different positions, such that the support plate 100 according to the present disclosure can be used in conjunction with different vehicle models, and can provide a large space for legs of a child sitting on the child safety seat so as to provide more safety and comfort experience.

Specifically, the support plate 100 according to the present disclosure includes a body 110 and a first sliding element 120 disposed on the body 110. The body 110 may be, for example, in a plate shape, or in other shapes such as a block shape. The first sliding element 120 may be slidingly fit to a second sliding element 220 disposed on the seat part 200, so that the support plate 100 may slide forward and rearward along the seat part 200.

In an embodiment shown in FIGS. 2B, 3 and 4, the first sliding element 120 may be a sliding rib located on an upper surface 110A of the body 110 (see FIG. 4), and the second sliding element 220 may be a sliding slot located on a lower surface of the seat part 200 (see FIG. 3). The sliding rib on the body 110 of the support plate 100 may be inserted into the sliding slot on the seat part 200 and slidable in the sliding slot, so that the support plate 100 may slide forward and rearward along the seat part 200.

In addition, the first sliding part 120 may also be a sliding slot on the upper surface 110A of the body 110, and the second sliding part 220 may also be a sliding rib on the lower surface of the seat part 200.

Of course, the present disclosure may not be limited thereto. The first sliding element 120 disposed on the body 110 and the second sliding element 220 disposed on the seat part 200 may also use other sliding-fit structures, as long as the support plate 100 can slide with respect to the seat part 200. For example, the first sliding element 120 may be a sliding rod disposed on the body 110, and the second sliding element 220 may be a sliding ring disposed on the seat part 200.

In one embodiment, as shown in FIGS. 4 and 9, the support plate 100 according to the present disclosure may further include a connecting element fixedly connected to the body 110. In this embodiment, as an example of a reinforcing tube 150, a connecting hole 250 into which the reinforcing tube 150 is inserted may be formed on the seat part 200. After the support plate 100 is assembled to the seat part 200, the reinforcing tube 150 may be inserted into the connecting hole 250, and as the support plate 100 is slidable and adjustable with respect to the seat part 200, the reinforcing tube 150 may be slidable in the connecting hole 250, so that the support plate 100 may be guided to slide along the seat part 200 forward and rearward, and when the support plate 100 protrudes out of a front side of the seat part 200, especially when a part of the support plate 100 protruding from the front side of the seat part 200 is larger than a part hidden in the lower surface of the seat part 200, the reinforcing tube 150 inserted into the connecting hole 250 can greatly enhance the supporting capacity of the support plate 100.

In the embodiment shown in FIG. 4, two reinforcing tubes 150 fixedly connected to the body 110 of the support plate 100 may be provided and are respectively located on left and right sides of the body 110 of the support plate 100, to evenly share a stress applied by the support plate 100. The number and shape of the reinforcing tubes 150 may vary as desired. For example, there may be one, three or more reinforcing tubes 150, and the reinforcing tubes 150 may be not only in a shape of a circular tube, but also in other shapes such as a square tube. Correspondingly, the connecting hole 250 into which the reinforcing tube 150 is inserted may also have a number and shape corresponding to that of the reinforcing tubes. Materials of the reinforcing tube 150 may be different from that of the support plate 100 and the seat part 200, such as a metal having strong rigidity, preferably stainless steel, carbon steel, and the like.

It should be noted that the support plate 100 may also be slidably connected to the seat part 200 only through the connecting element (such as “the reinforcing tube 150” in the above-mentioned embodiment), that is, without the cooperation between the first sliding element and the second sliding element. Regarding this embodiment, reference may also be made to the description in conjunction with FIGS. 14 and 15 below.

When the support plate 100 may be slidable between the extended position and the retracted position, the support plate 100 according to the present disclosure may further include a first locking element 130, in order to adjust and position the support plate 100 at different positions with respect to the seat part 200, such that the support plate may be used in different vehicle models. The first locking element 130 is disposed on the body 110 and may be movable between a locking position and an unlocking position. When the first locking element 130 is in the locking position, it may engage with a second locking element 230 on the seat part 200 such that the support plate 100 may be positioned with respect to the seat part 200. When the first locking element 130 is in the unlocking position, it disengages from the second locking element 230 on the seat part 200 such that the support plate 100 may be slidable with respect to the seat part 200 and may be adjusted to a proper position.

The first locking element 130 may be disposed on the lower surface 110B of the body 110, and when it is in the locking position, an engaging end 131 of the first locking element 130 may pass through a through hole on the body 110 and protrude from the upper surface 110A of the body 110, to engage with the second locking element 230 on the seat part 200. For example, in the embodiment shown in FIGS. 4, 6 and 7B, the first locking element 130 is a strip pivotally connected to the lower surface 110B of the body 110 (see FIG. 6). The strip may be pivotable so that when it is in the locking position, the engagement end 131 thereon may pass through the body 110 and protrude from the upper surface 110A of the body 110 (see FIG. 4).

In the embodiment shown in FIG. 7B, the second locking element 230 is a positioning hole disposed on the lower surface of the seat part 200.

When the strip served as the first locking element 130 is in the locking position, the engaging end 131 may pass through the body 110 and protrude from the upper surface 110A of the body 110 to engage with the positioning hole served as the second locking element 230 on the seat part 200, so that the support plate 100 may be positioned in this position with respect to the seat part 200. When the strip served as the first locking element 130 is in the unlocking position, the engaging end 131 may retract into the body 110 and disengage from the positioning hole served as the second locking element 230 on the seat part 200, and at this moment, the support plate 100 may be freely slidable with respect to the seat part 200.

It should be understood that a plurality of positioning holes served as the second locking element 230 may be provided in a front and rear direction of the seat part 200. The engaging end 131 of the strip served as the first locking element 130 are engaged with different positioning holes, the support plate 100 may be positioned at different positions with respect to the seat part 200 so that it can be used in different vehicle models.

Of course, the present disclosure may not be limited thereto. According to the present disclosure, the first locking element 130 of the support plate 100 and the second locking element 230 on the seat part 200 may adopt other cooperating structures, as long as these cooperating structures can realize the locking and unlocking of the support plate 100 with respect to the seat part 200. For example, the first locking element 130 may be a positioning hole disposed on the body 110 of the support plate 100, and the second locking element 230 may be a strip disposed on the seat part 200. Alternatively, the first locking element 130 may be a positioning pin disposed to the body 110 of the support plate 100, and the second locking element 230 may be a positioning slot disposed on the seat part 200. In addition, the “positioning structure” (corresponding to the first locking element 130 in this embodiment) configured to position the seat part to the base may also refer to an assembly including a plurality of elements or parts or components, rather than a single component, reference can be made to the positioning structure 343 shown in the subsequent embodiments of FIGS. 22 and 23, but the present disclosure may not be limited thereto.

In order to facilitate the user to operate the engagement and disengagement between the first locking element 130 of the support plate 100 and the second locking element 230 on the seat part 200, the support plate 100 according to the present disclosure may further include an operating element 140. The operating element 140 is disposed to the body 110 and may be operated by a user to drive the movement of the first locking element 130 between the locking position and the unlocking position. When the operating element 140 is operated by the user to drive the movement of the first locking element 130 between the locking position and the unlocking position, the first locking element 130 of the support plate 100 disengages from the second locking element 230 on the seat part 200. When the operating element 140 is operated by the user to drive the movement of the first locking element 130 between the unlocking position and the locking position, the first locking element 130 of the support plate 100 engages with the second locking element 230 on the seat part 200.

In the embodiment shown in FIG. 5, the operating element 140 is a slidable handle disposed on the lower surface 110B of the body 110. For example, the handle may be provided with a sliding slot in cooperation with the reinforcing tube 150, so that the handle may be slidable along the reinforcing tube 150. A pushing rib 141 is provided on the handle. As it is required to adjust the support plate 100, the user pulls the handle served as the operating part 140, and the pushing rib 141 on the handle may push the first locking element 130 to move from the locking position to the unlocking position, so that the first locking element of the support plate 100 130 disengages from the second locking element 230 on the seat part 200, and the support plate 100 may be adjusted with respect to the seat part 200.

Of course, the operating element 140 according to the present disclosure may also employ other structures, as long as it can drive the movement of the first locking element 130. For example, the operating element 140 may be a button or an operating rod, and the user drives the movement of the first locking element 130 between the locking position and the unlocking position by pressing the button or pulling the operating rod.

In order to operate the operating element 140 easily, in the embodiment shown in FIG. 6, the support plate 100 may further include an elastic element 160 disposed to bias the first locking element 130 towards the locking position. In the embodiment shown in FIG. 6, the elastic element 160 may be a torsion spring disposed at a pivot shaft of the strip served as the first locking element 130, and the torsion spring may pivot the strip served as the first locking element 130, so that the engaging end 131 thereof may pass through the body 110 and protrude from the upper surface 110A of the body 110 to engage with the positioning hole served as the second locking element 230 on the seat part 200. The elastic element 160 may be configured such that the user may only need to operate the operating element 140 to resist an elastic force of the elastic element 160 and drive the movement of the first locking element 130 from the locking position to the unlocking position, and the engaging end 131 may retract into the body 110, such that the disengagement between the first locking element 130 of the support plate 100 and the second locking element 230 on the seat part 200 can be implemented. Once the user no longer applies a force on the operating element 140, the elastic element 160 will bias the first locking element 130 to move from the unlocking position to the locking position. In this way, it is convenient for the operation of the user, and the structure of the operating element 140 can be simplified as it is unnecessary for the operating element to drive the movement of the first locking element 130 from the unlocking position to the locking position.

It should be understood that the elastic element 160 in the present disclosure may also adopt various elastic structures such as a compression spring, a tension spring, a hydraulic rod or a pneumatic rod, as long as the first locking element 130 may be biased towards the locking position.

It can be understood that, in the embodiments as described above in combination with FIGS. 4 to 7B, the first locking element 130 included in the support plate 100, optionally, the operating element 140 and the elastic element 160 may be configured as a support plate adjustment mechanism for adjusting and positioning the support plate 100 to different positions with respect to the seat part 200. Of course, the support plate adjustment mechanism may also be arranged in other different structures, for example, another support plate adjustment mechanism may be described below with reference to FIGS. 21 to 24.

In order to prevent the support plate 100 from disengaging from the seat part 200, the support plate 100 may also be provided with a limiting mechanism, for example, the limiting mechanism may include a limiting rib and a limiting slot. Specifically, in the embodiment shown in FIGS. 8A and 8B, the body 110 of the support plate 100 may also be provided with a limiting rib 111. At the same time, the seat part 200 may include a cover 210 at the front side, and the cover 210 is provided with a limiting slot 211. When the support plate 100 slides to the furthest extended position, the limiting rib 111 on the body 110 may be blocked by the limiting slot 211 on the cover 210, thereby preventing the support plate 100 from continuing to slide forward and disengaging from the seat part 200. More specifically, referring to FIG. 8B, when the support plate 100 may slide to the furthest extended position, a vertical segment 111A of the limiting rib 111 may be blocked by the blocking part 211A of the limiting slot 211, so that the body of the support plate 100 may be restricted.

In addition, a child safety seat may also be provided in another embodiment of the present disclosure.

Referring to FIGS. 10 and 11, FIGS. 10 and 11 respectively show different states of the child safety seat and a support plate 300 provided thereon according to another embodiment of the present disclosure.

Specifically, the child safety seat of this embodiment may include a seat part 400 in which a child sits and a base 500 to which the seat part 400 is provided. The seat part 400 may be slidable with respect to the base 500, and may be at different angles a with respect to the base 500, wherein a is greater than or equal to 0. It should be noted that “the seat part 400 may be at the angle a with respect to the base 500” as described herein refers to an angle of a plane as defined by a position of the seat part 400 in which the child sits or a bottom plane of the seat part 400 with respect to the base 500 (for example, a plane for supporting the seat part 400). For example, FIGS. 10 and 11 respectively show the seat part 400 may have two different angles with respect to the base 500, that is, the seat part 400 shown in FIG. 10 is substantially parallel to the base 500, i.e., a is substantially equal to 0; and the angle a of the seat part 400 with respect to the base 500 shown in FIG. 11 is greater than 0, for example about 30° to 40°. Of course, the present disclosure may not be limited thereto.

Similar to the embodiment shown in FIG. 1, the child safety seat according to another embodiment of the present disclosure may also be provided with a support plate 300. As shown in FIGS. 10 and 11, the support plate 300 may be slidably connected to the seat part 400 to be telescopic from the front end of the seat part 400, so that it may abut against the backrest of the vehicle seat, for example, when the child safety seat is used in a rear-facing mode, and then prevent the child safety seat from being overturned; and at the same time, the support plate 300 may also provide support for legs of the child sitting on the seat part 400. For example, the support plate 300 of this embodiment may be slidable and may be positioned between the retracted position shown in FIG. 10 and the extended position shown in FIG. 11. Hereinafter, the specific structure and arrangement of the support plate 300 in this embodiment will be described in detail in the description of FIGS. 14 to 19.

Referring to FIGS. 12 and 13, FIG. 12 shows a side cross-sectional view of the child safety seat shown in FIG. 11, and FIG. 13 shows a perspective view of the child safety seat viewed from another angle.

The seat part 400 and the base 500 of the child safety seat of the present disclosure may be slidable to each other. Specifically, the seat part 400 and the base 500 can be slidably connected through components cooperated with each other. For example, FIG. 12 shows a sliding connection between the seat part 400 and the base 500 according to an example, and FIG. 13 shows a sliding connection between the seat part 400 and the base 500 according to another example.

As shown in FIGS. 12 and 13, the seat part 400 is slidably connected with the base 500 through at least one sliding assembly. Each of the sliding assemblies may include sliding members 410A, 410B and sliding-fit members 520A, 520B. The sliding members 410A, 410B may be provided to the seat part 400. The sliding-fit members 520A, 520B may be disposed to the base 500 and slidingly fit to the sliding members 410A, 410B, respectively.

In an example, as shown in FIG. 12, the sliding member 410A is a screw fixed to the bottom of the seat part 400 through a connecting column 410C, and the sliding-fit member 520A may be an arc-shaped elongated slot extending on the upper surface of the base 500 along a direction in which the seat part 400 slides with respect to the base 500. In a preferred example, at least one arc-shaped elongated slot may be provided on the bottom side of the seat part 400. At least one arc-shaped elongated slot may be provided at the bottom side of the seat part 400, at the bottom surface of the seat part 400 in contact with the base 500, and a combination of at least one connecting column and at least one screw may be correspondingly provided on the upper surface of the base 500. Specifically, a connecting column 410C (such as a columnar structure with a threaded hole) may be fixedly arranged on the bottom side of the seat part 400. The connecting column 410C may extend into the arc-shaped elongated slot of the base 500, and the screw is connected with the connecting column 410C so that the screw, together with the connecting column 410C, may slide along the arc-shaped elongated slot, such that the sliding connection between the seat part 400 and the base 500 can be realized. Preferably, a diameter of a head of the screw is greater than a width of the arc-shaped elongated slot on the upper surface of the base 500, and optionally, a cross-sectional shape of the arc-shaped elongated slot may be adapted to a cross-sectional shape of the screw and the connecting column 410C, such as an inverted T shape, so that the seat part 400 may be slidably connected to the base 500 without being disengaged in a direction perpendicular to a sliding direction thereof. That is, during the seat part 400 is slidable with respect to the base 500, the screw and connecting column may not disengage from the arc-shaped elongated slot. It should be noted that the present disclosure is not limited to the number of arc-shaped elongated slots, connecting columns and screws as mentioned above or as shown in the figures, two or more arc-shaped elongated slots may also be provided, and a corresponding number of connecting columns and screws may be provided correspondingly. In addition, in other examples, the connecting columns and screws may also be provided on the base 500, while the arc-shaped elongated slots may be provided on the seat part 400. Furthermore, the present disclosure may only provide the connecting column 410C (i.e., without a screw), and the shape of the connecting column 410C may be a hollow cylinder, cuboid, trapezoid, etc., but the present disclosure may not be limited thereto.

In another example, as shown in FIG. 13, the sliding member 410B may be an arc-shaped sliding slot provided on a bottom side surface of the seat part 400, and the sliding-fit member 520B may be an inserting pin correspondingly provided on the base 500. Preferably, at least two arc-shaped sliding slots may be provided on the side surface of the seat part 400 in contact with the base 500, and at least two inserting pines may be correspondingly provided on the base 500. For example, an arc-shaped sliding slot may be provided on each of two inside surfaces of the seat part 400, and an inserting pin may be correspondingly provided at a position of the base 500 in matched with the inside surface of the seat part 400. Of course, the present disclosure may not be limited thereto. In other examples, positions of the arc-shaped sliding slot and the inserting pin may be interchanged, that is, the arc-shaped sliding slot may be provided on the base 500, and the inserting pin may be provided on the seat part 400. Optionally, a single inserting pin may be provided on the seat part 400, and two ends of the single inserting pin may be exposed to both sides of the seat part 400, and cooperate with the arc-shaped sliding slots of the base 500, respectively.

It should be noted that both of the sliding member 410A and the sliding-fit member 520A and the sliding member 410B and the sliding-fit member 520B of the above-mentioned two examples may be provided at the same time, to further increase the stability of the sliding connection between the seat part and the base. Of course, the present disclosure may not be limited thereto, and other sliding connection manners may also be adopted or combined.

Referring to FIGS. 14 to 16, FIG. 14 shows the child safety seat according to another embodiment of the present disclosure viewed from another different angle, FIG. 15 shows a structural schematic view of the support plate 300, and FIG. 16 shows a partial perspective view of the child safety seat, showing a connection manner between the seat part 400 and the support plate 300.

As shown in FIG. 14, the support plate 300 may be slidably provided on the seat part 400, and may be extended and retracted from the front end of the seat part 400. Further referring to FIGS. 14 and 15, the support plate 300 may include a body 310 and a connecting element 320. In an example, the body 310 of the support plate 300 may be formed by connecting an upper cover 311, a lower cover 312 and a bottom plate 313, wherein the upper cover 311 and the lower cover 312 may form a part of the support plate 300 exposed from the seat part 400, and the bottom plate 313 may be connected to a rear end of the upper cover 311 and a rear end of the lower cover 312 and located therebetween. In an example, the bottom plate 313 may have an extension 313a extending rearwards by a certain length from a shell formed by the upper cover 311 and the lower cover 312, which can facilitate enhancing the stability of the support plate 300 when sliding with respect to the seat part 400. In an example, two connecting elements 320 may be provided, wherein the two connecting elements 320 may be symmetrically arranged on left and right sides of the body 310, and the extension 313a may be located between the two connecting elements 320. Preferably, the extension 313a may be a sheet structure. At least a portion of the connecting element 320 may be fixed on the body 310, and the other part thereof may extend from the body 310 to be slidably inserted into a connecting hole 401 which is correspondingly provided on the seat part 400 and has a complementary shape, so that the support plate 300 may be slidably connected to seat part 400. In an example, as shown in FIG. 15, a length of the extension 313a may be less than a length of the connecting element 320 extending from the body 310 (for example, from the shell formed by the upper cover 311 and the lower cover 312). More specifically, at least a portion of the connecting element 320 may be fixedly connected to the bottom plate 313 of the support plate 300 by a rivet, and the specific connection between the connecting element 320 and the body 310 may be not shown in FIGS. 14 to 16 since the cover of the support plate 300 is blocked, please refer to the subsequent FIG. 18.

In addition, the connecting element 320 in this embodiment may be in a shape of a circular tube, a square tube, a circular rod, or a square rod, etc., and the present disclosure is not limited to the above embodiments, and there may be one, three or more than three connecting elements.

In an example, as shown in FIGS. 15 and 16, the support plate 300 further includes a first sliding element 330 slidingly fit to a second sliding element 402 provided on the seat part 400 correspondingly, to further enhance the sliding connection between the support plate 300 and the seat part 400. In a preferred example, the first sliding element 330 may be disposed on the upper surface of the support plate 300, and more specifically on the body 310 of the support plate 300. More preferably, as shown in FIG. 16, one of the first sliding element 330 and the second sliding element 402 is a sliding rib, such as a T-shaped or L-shaped sliding rib or the like, and the other one of the first sliding element 330 and the second sliding element 402 is a sliding slot, such as a T-shaped or L-shaped sliding slot or the like. In addition, the first sliding element 330 and the second sliding element 402 may also adopt other sliding-fit structures, such as a sliding rod and a sliding ring, as long as the support plate 300 may be slidable with respect to the seat part 400. In addition, although only two first sliding elements 330 in this embodiment are shown in FIG. 15, it should be understood for those skilled in the art that other numbers, such as one, three, four of the first sliding elements 330 may also be provided. It should be noted that the first sliding element 330 may be configured such that the support plate 300 can never protrude from the seat part 400 in order to avoid interfering with or catching clothes of the children during the support plate 300 is slidable with respect to the seat part 400.

Referring to FIGS. 17 to 20, FIG. 17 shows a perspective view of the child safety seat according to another aspect of the present disclosure, in which a bottom cover plate between the support plate 300 and the seat part 400 is removed; FIGS. 18 and 19 respectively show a partial perspective view of the child safety seat viewed from above, in which the upper cover 311 of the support plate 300 is removed to show the internal structure of the support plate 300, more specifically, FIG. 18 shows that an unlocking operating member 421 of a seat angle adjustment mechanism is in a locking position, and FIG. 19 shows that the unlocking operating member 421 of the seat angle adjustment mechanism is in an unlocking position; and FIG. 20 shows the base 500 provided with a locking hole 510 in matched with a seat angle adjustment mechanism.

In order to increase comfort of the child safety seat, the child safety seat may also be provided with a seat angle adjustment mechanism, that is, a mechanism capable of adjusting an angle of the seat part 400 of the child safety seat with respect to the base 500. Specifically, the seat angle adjustment mechanism may be provided between the seat part 400 and the base 500 to adjust the angle, such as an angle a shown in FIG. 11 of the seat part 400 with respect to the base 500.

As shown in FIGS. 17 to 19, the seat angle adjustment mechanism may include an unlocking operating member 421, a connecting member 422 and an angle locking structure 424. The unlocking operating member 421 may be disposed on the support plate 300 connected to the front end of the seat part 400, and may be operated to move between an unlocking position (as shown in FIG. 19) and a locking position (as shown in FIG. 18). In an example, the unlocking operating member 421 may be slidably disposed on the support plate 300, and at least partially exposed from the support plate 300 in order to be operated from the outside. More specifically, as shown in FIG. 17, the unlocking operating member 421 is disposed on a lower side of the front end of the support plate 300, and at least partially exposed from the lower side of the support plate 300. For example, the lower cover 312 of the support plate 300 may be provided with a window 312A at a position corresponding to the unlocking operating member 421, and the user can operate the unlocking operating member 421 from the window 312A to avoid interference or misoperation caused by the unlocking operating member 421 protruding from the lower side of the support plate 300. In addition, the unlocking operating member 421 of the present disclosure may be not limited to the above-mentioned positions, that is, it may also be disposed at other positions of the support plate 300, such as any sides or upper surfaces of the support plate 300, and optionally, although only one unlocking operating member 421 is shown in FIG. 17, it should be understood that a plurality of unlocking operating members 421 may also be provided. For example, one unlocking operating member 421 may be provided on each of both sides of the support plate 300, and any one of unlocking operating members 421 may be operated to adjust the angle locking structure 424, and even adjust a plurality of angle locking structures 424 synchronously.

The connecting member 422 may be connected between the unlocking operating member 421 and the angle locking structure 424, and the angle locking structure 424 may be disposed between the seat part 400 and the base 500 to lock or unlock the seat part 400 with respect to the base 500. Referring to FIGS. 17 and 18, one end of the connecting member 422 may be fixedly connected to the unlocking operating member 421, and the other end thereof may be fixedly connected to the angle locking structure 424, so that the angle locking structure 424 may unlock the seat part 400 and the base 500 under the traction of the connecting member 422 while operating the unlocking operating member 421. In a specific example, the connecting member 422 may be a flexible element, such as a steel wire, to avoid interfering the extension and retraction of the support plate 300. More specifically, referring to a part where the bottom cover plate of the seat part 400 is removed in FIG. 17, the other end of the connecting member 422 may pass through the support plate 300 and may be connected to the angle locking structure 424.

In an example, a receiving slot 3131 for fixing the connecting member 422 may also be provided on the extension 313a (such as a sheet structure) of the bottom plate 313 of the support plate 300. The number of receiving slots 3131 corresponds to the number of connecting members 422, particularly referring to FIG. 15. For example, referring to FIGS. 15 and 17, two receiving slots 3131 may be symmetrically disposed at intervals on the extension 313a to respectively receive a corresponding connecting member 422 therein. Therefore, in addition to enhancing the sliding stability of the support plate 300, the extension 313a may also block the connecting member 422, to prevent the connecting member 422 from being interfered by external devices and make the appearance of the child safety seat neat. For example, the receiving slot 3131 may be in a U-shaped structure with an opening facing towards the seat part 400. However, the present disclosure may not be limited thereto, that is, the receiving slot 3131 may also have other shapes, as long as it can receive the connecting member 422.

In an example, a plurality of connecting members 422 and a plurality of angle locking structures 424 may be provided. In this embodiment, two connecting members 422 and two angle locking structures 424 may be taken as an example. As shown in FIG. 17, two angle locking structures 424 are respectively arranged on the inner sides of the seat part 400 facing towards each other and are located on the front side of the sliding assembly. Each of the connecting members 422 may have one end connected to one of the parts symmetrical to each other of the unlocking operating member 421 and the other end connected to one of the angle locking structures 424. More specifically, the connecting member 422 may extend from the unlocking operating member 421 through the receiving slot 3131 of the support plate 300, and then extend from the support plate 300 and connected to one end of the angle locking structure 424, in order to control the two angle locking structures 424 synchronously through the unlocking operating member 421.

In an example, as shown in FIGS. 18 and 19, the seat angle adjustment mechanism may further include a reset member 423, the reset member 423 may be disposed between the unlocking operating member 421 and the support plate 300, and constantly provide a force to make the unlocking operating member 421 in the locking position or return to the locking position.

In addition, the angle locking structure 424 may have a plurality of locking positions with respect to the base 500, so that the seat part 400 may be locked at several angles with respect to the base 500, so as to realize the angle adjustment of the child safety seat.

As shown in FIG. 17, the angle locking structure 424 may include an engaging pin 4241 which may be movably disposed on the seat part 400. Specifically, as shown in FIG. 17, one end of the locking pin 4241 may be linked with the unlocking operating member 421 through the connecting member 422, and may be engaged with at least one engaging hole 510 provided on the base 500. Preferably, as shown in FIGS. 17 and 20, the base 500 may be provided with a plurality of engaging holes 510, so that the engaging pin 4241 may be engaged with one of the engaging holes 510 provided on the base 500 with the variation of angles of the seat part 400 relative to the base 500. It should be noted that only three engaging holes 510 are shown in FIG. 20, but the present disclosure may not be limited thereto. That is, the base 500 may also be provided with further more engaging holes, such as four, five, six, etc., to provide a fine angle adjustment.

Moreover, the angle locking structure 424 may also include an engaging reset member 4242 that may be disposed between the seat part 400 and the engaging pin 4241 to bias the engaging pin 4241 towards the corresponding engaging hole 51, that is, constantly providing a force to allow the engaging pin 4241 to engage with the corresponding engaging hole 510.

It should be noted that although the seat angle adjustment structure in this embodiment may be disposed to fit to the support plate 300, the present disclosure may not be limited thereto, and the seat angle adjustment structure may also be fit to that in the embodiment described above in combination with FIGS. 4 to 7B, that is, the unlocking operating member 421 of the seat angle adjustment structure may also be disposed on the support plate 100 in the foregoing embodiments, for example, on its front end, either side, or the like. In addition, it should also be understood that the seat angle adjustment structure may also be used in cooperation with a non-adjustable support plate, that is, the unlocking operating member 421 of the seat angle adjustment structure may be disposed on a seat with the non-adjustable support plate. Such configuration can also facilitate the user not to be blocked by the support plate 300 when it is required to operate the unlocking operating member 421 to adjust an angle of the seat.

The principle of the seat angle adjustment mechanism will be specifically described below by taking the angle locking structure 424 shown in FIGS. 17 to 19 as an example.

Prior to adjusting the angle of the seat, as shown in FIGS. 17 and 18, the unlocking operating member 421 may be in the locking position, the seat part 400 may be positioned with respect to the base 500, and the engaging pin 4241 of the angle locking structure 424 may be engaged with the engaging hole 510 on the base 500 under the elastic action of the engaging reset member 4242.

When the adjustment of the angle of the seat is required, the user may operate the unlocking operating member 421 to the unlocking position (as shown in FIG. 17) in a direction of resisting the reset member 423, for example, by pressing the unlocking operating member 421 from the window 213A (see FIG. 17) on the support plate 300 to pull the connecting member 422, so that the engaging pin 4241 can resist the elastic effect of the engaging reset member 4242 to disengage from the engaging hole 510 under the traction of the connecting member 422. At this time, the seat part 400 may be unlocked from the base 500 and may be slidable with respect to the base 500 so as to be adjusted to a desired angle.

When the seat may be adjusted to the desired angle, the user may release the unlocking operating member 421, the unlocking operating member 421 may return to the locking position as shown in FIG. 18 under the elastic action of the reset member 423, and the engaging pin 4241 may return to an engaging position as shown in FIG. 17 under the elastic action of the engaging reset member 4242. Preferably, an elastic force of the engaging reset member 4242 may be greater than an elastic force of the reset member 423, so that the connecting member 422 can always be maintained in a tensioned state.

Referring to FIGS. 21 to 24, FIG. 21 shows another partial perspective view of the child safety seat according to another aspect of the present disclosure, in which the upper cover 311 of the support plate 300 is removed to show the internal structure of the support plate 300; FIG. 22 shows a top partial perspective view of the support plate 300 and the seat part 400; FIG. 23 shows a cross-sectional view taken along a line “D-D” in FIG. 22; and FIG. 24 shows a perspective view of the support plate 300, in which the upper cover 311 and the bottom plate 313 are removed.

In order to further improve the comfort of the child safety seat, adapt to different vehicle models better, and provide support for different legs of children, a support plate adjustment mechanism 340 may also be provided on the support plate 300 to adjust a telescopic position of the support plate 300 with respect to the seat part 400, that is, adjust a length of the support plate 300 extending from the seat part 400.

In an example, the support plate adjustment mechanism 340 may include an operating element 341 and a positioning structure 343. For ease of understanding, FIG. 21 mainly shows the structure of the operating element 341 without the positioning structure 343, FIG. 22 shows the positioning method between the support plate 300 and the seat part 400, and FIGS. 23 and 24 show connection and cooperation between the positioning structure 343 and the operating element 341.

As shown in FIG. 21, the operating element 341 may be slidably disposed on the support plate 300, and may be slidable between a locking position (see FIG. 21) and a releasing position (not shown). Referring to FIG. 14, the operating element