Base assembly and child seat

Abstract

The present disclosure provides a base assembly including a base, a sliding element, a support leg, and a support leg extension structure, wherein the sliding element is telescopically arranged on the base, the support leg is pivotally connected to the sliding element and extends and retracts together with the sliding element, the support leg has an extended position when in use and a folded position when not in use, and the support leg extension structure moves the sliding element and the support leg inside the base in response to pivoting the support leg from the extended position to the folded position.

Description

Technical Field

[0001] The present disclosure relates to the technical field of child seats, and specifically, to a base assembly and a child seat that are convenient to operate.

Background Art

[0002] A child seat has become an essential carrier for a child going out. To enhance the stability and use safety of the child seat, a support leg structure is attached to the base. During use, the support leg structure is deployed and grounded, which can well support the child seat and prevent the child seat from tipping over. When not in use, the support leg structure can be folded at the bottom of the base to reduce the volume of the child seat.

[0003] However, a child seat provided with a support leg structure has a protrusion configured to rotate by attaching the support leg structure to the tip of its base. When the support legs are not needed, the protrusions are in the way, which not only affects the child's riding experience but also increases the volume of the child seat and the transportation cost.

[0004] A child seat having a telescopic support leg structure can solve the above problems, but two steps are required for folding and retracting. It is necessary to fold the support leg structure and push the support leg structure to retract it to achieve the purpose of completely folding it. This method has complex operations and a poor user experience.

Summary of the Invention

[0005] The present invention provides a base assembly comprising a base, a sliding element, a support leg, and a support leg extension structure, wherein the sliding element is retractably positioned on the base, the support leg is rotatably connected to the sliding element and extends and retracts together with the sliding element, the support leg has an extended position when in use and a folded position when not in use, and the support leg extension structure moves the sliding element and the support leg inward from the base in response to the rotation of the support leg from the extended position to the folded position.

[0006] In another embodiment, a child seat is provided, comprising a base assembly and a seat positioned on the base assembly, wherein the base assembly is the base assembly described above. [Brief explanation of the drawing]

[0007] Various purposes, features, and advantages of this disclosure will become more apparent by considering the following detailed description of preferred embodiments of this disclosure in conjunction with the accompanying drawings. The drawings are illustrative only and do not need to be drawn to scale. In the drawings, the same reference numerals always refer to the same or similar parts.

[0008] [Figure 1] This is a side view of the base assembly of the present disclosure with the support legs of the base assembly in the deployed position. [Figure 2] This is a side view of the base assembly of the present disclosure with the support legs in the folded position. [Figure 3] This is a partial perspective view of a base assembly in the first embodiment of the present disclosure, with the support legs of the base assembly in the deployed position. [Figure 4] This is a perspective view of a base assembly in the first embodiment of the present disclosure, with the support legs of the base assembly in the deployed position. [Figure 4A] This is a partial view of Figure 4. [Figure 5]This is a partial perspective view of a base assembly in the first embodiment of the present disclosure, with the support legs of the base assembly in the folded position. [Figure 6] This is a partial perspective view of a base assembly in the first embodiment of the present disclosure, with the support legs of the base assembly in the folded position. [Figure 7] This is a partial perspective view of a base assembly in a second embodiment of the present disclosure, with the support legs of the base assembly in the deployed position. [Figure 8] This is a partial perspective view of a base assembly in a second embodiment of the present disclosure, with the support legs of the base assembly in the folded position. [Figure 9] This is a partial perspective view of a base assembly in a second embodiment of the present disclosure, with the support legs of the base assembly in the deployed position. [Figure 10] This is a partial perspective view of a base assembly in a third embodiment of the present disclosure, with the support legs of the base assembly in the deployed position. [Figure 11] This is a schematic partial cross-sectional view of a base assembly in which the support legs of the base assembly in a third embodiment of the present disclosure are in the deployed position. [Figure 12] This is a perspective view of the traction rod of the base assembly in a third embodiment of the present disclosure. [Figure 13] This is a partial perspective view of a base assembly in a third embodiment of the present disclosure, with the support legs of the base assembly in the folded position. [Figure 14] This is a schematic partial cross-sectional view of a base assembly in a third embodiment of the present disclosure, with the support legs of the base assembly in the folded position. [Explanation of Symbols]

[0009] Base Assembly 1 Base 10 Fixed frame 120 Base bracket 160 Slide rod 161 Receiving groove 170 180 rock elements Support legs 20 Connector 240 Protective cover 250 Slide element 30 Slide bracket 340 Slide groove 341 Housing 350 Traction element 40 Wire 410 Jacket 420 Limiting boss 430 Drive element 500 Traction element limiting groove 501 Traction element connection part 502 Rotating linkage assembly 510 Pivot shaft 511 Connection column 512 Rotating linkage 513 Connection lug 514 Gear assembly 520 Traction rack 521 Transmission gear 522 Traction rod assembly 530 Traction rod 531 First rotating shaft 5311 Second rotating shaft 5312 Mounting lug 532 Avoidance groove 533 First rotating hole 534 Second rotating hole 535 First restoring element 540 Second restoring element 550

Mode for Carrying Out the Invention

[0010] To more clearly explain the overall concept of the present disclosure, the following detailed description will be described by taking the drawings in the specification as examples.

[0011] In the following description, many specific details are proposed for a full understanding of the present disclosure. However, the present disclosure can be implemented in other ways different from the methods described in this specification. Therefore, the protection scope of the present disclosure is not limited by the specific embodiments disclosed below.

[0012] Furthermore, in the description of this disclosure, terms such as "center," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "up," "down," "inside," "outside," "axial," "radial," and "circumferential" indicate orientation or positional relationships based on the orientation or positional relationships shown in the drawings. These terms are merely for convenience to describe and simplify the disclosure and do not indicate or imply that the shown devices or components must have a specific orientation, or that they must be configured and operate in a specific orientation, and therefore should not be construed as limiting this disclosure.

[0013] In this disclosure, unless otherwise specified or limited, the terms “attached,” “connected,” “joined,” and “fixed” should be understood broadly, for example, that they may be fixed, detachable, or integrated, or that they may be directly connected, indirectly connected via an intermediate medium, or in internal communication between two components or interaction between two components. However, direct connection means that the two connected entities form a whole through the connection structure rather than establishing a connection relationship through an excessive structure. A person skilled in the art will be able to understand the specific meaning of the above terms in this disclosure depending on the specific context.

[0014] In this disclosure, unless otherwise specified or limited, the first feature may be in direct contact with the second feature, either "above" or "below," or indirectly with the second feature via an intermediate medium. In this specification, the terms “embodiments” and “some embodiments” refer to “examples,” “specific examples,” or “some examples,” and the statements “examples,” “specific examples,” or “some examples” mean that the specific features, structures, materials, or properties described in relation to an embodiment or example are included in at least one embodiment or example of this disclosure. In this specification, the general expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or properties described may be combined in appropriate ways in any one or more embodiments or embodiments.

[0015] This disclosure provides a child seat that can be attached to a vehicle seat, allowing a baby or child to ride in it and ensuring the safety of the occupants.

[0016] As shown in Figures 1 and 2, the child seat includes a base assembly 1 and a seat (not shown). The base assembly 1 includes a base 10 and support legs 20. The seat is rotatably positioned on the base 10 and has at least a forward position and a rear position. The forward position may be a position where the seat faces forward of the vehicle, and the rear position may be a position where the seat faces rearward of the vehicle. For example, the forward position is suitable for older children and the rear position is suitable for younger children, but the application is not limited to this.

[0017] The support legs 20 are rotatably and retractably connected to the base 10. When the support legs 20 are in use, they can extend from the base 10 and rotate to the ground (as shown in Figure 1), thereby preventing the child seat from tipping over during a collision. When the support legs 20 are not needed, they can rotate synchronously and retract into the base 10 (as shown in Figure 2), thereby reducing the overall size of the child seat and making it easier to store and use.

[0018] The first embodiment of this disclosure will be described below, mainly with reference to Figures 3 to 6.

[0019] The base assembly 1 includes a base 10, a retractable sliding element 30 positioned on the base 10, a support leg 20, and a support leg extension structure. The support leg 20 is rotatably connected to the sliding element 30 and extends and retracts together with the sliding element 30. The support leg 20 has an extended position when in use (as shown in Figure 1) and a folded position when not in use (as shown in Figure 2). The support leg extension structure acts together the sliding element 30 and the support leg 20 so that the support leg 20 moves inward towards the base 10 in response to the rotation of the support leg 20 from the extended position to the folded position.

[0020] In this embodiment, the support leg extension structure includes a drive element 500 and a guide assembly (described in detail below).

[0021] The base 10 includes a base bracket 160. The base 10 may be provided with a fixing frame 120. The fixing frame 120 and the base bracket 160 can be used as a support. The base 160 may have a frame structure and may be formed as two parallel, symmetrical tubular elements extending in the front-rear direction of the base 10. The fixing frame 120 can be connected to the two tubular elements of the base bracket 160.

[0022] The sliding element 30 includes a sliding bracket 340. The sliding bracket 340 is sleeved to the base bracket 160 and can slide a certain distance relative to the base bracket 160. In other words, the sliding bracket 340 may form two parallel portions corresponding to the parallel portions of the base bracket 160. As clearly shown in Figure 11 (although this has been explained with reference to Figure 11, it will be understood that the structure shown in Figure 11 is applicable to other embodiments), the base bracket 160 includes a sliding rod 161, and the sliding bracket 340 may include a sliding groove 341. The sliding groove 341 is formed in an elongated shape so that the sliding rod 161 can move a certain distance.

[0023] Referring to Figure 4, the base 10 further includes a receiving groove 170. When the support legs 20 are folded, the support legs 20 in the folded position can be housed in the receiving groove 170 so as not to protrude from the bottom surface of the base 10, or to protrude only slightly from the bottom surface of the base 10. The base 10 may also include a locking element 180. The locking element 180 may be formed as a push button and is movably mounted on the bottom surface of the base 10 and can engage with and lock one end of the support leg 20 when it is folded into the receiving groove 170. The locking element 180 can prevent the support leg 20 from rotating unexpectedly and moving away from the unfolded position.

[0024] The sliding element 30 further includes a housing 350 connected to the sliding bracket 340. The housing 350 may be connected and secured to the sliding bracket 340, for example, via rivets.

[0025] The protective cover 250 may be provided inside the housing 350 (see Figures 8 and 9). The pivot shaft can pass through the slide bracket 340, the protective cover 250, the drive element 500, and the support leg 20. That is, the protective cover 250 may be provided coaxially with the drive element 500. When the support leg 20 rotates to the folded position, the protective cover 250 rotates with the support leg 20 to shield the gap between the support leg 20 and the housing 350 of the slide element 30, thereby preventing injury.

[0026] The base assembly 1 further includes a first recovery element 540 and a second recovery element 550. The first recovery element 540 may be formed as a tension spring, and the second recovery element 550 may be formed as a torsion spring, but the application is not limited thereto. The first recovery element 540 can be used to move the slide element 30 toward the outside of the base 10.

[0027] The first recovery element 540 can be formed as two tension springs connecting the slide bracket 340 and the base bracket 160 to apply tensile force. When the slide element 30 is retracted into the base 10 from its position protruding from the front of the base 10 (the slide element 30 is at least partially inside the base 10), the first recovery element 540 stores energy, and when the locking element 180 releases the support leg 20 in the folded position, the first recovery element 540 releases the stored energy to provide tension and move the slide element 30 back to its position protruding from the front of the base 10.

[0028] Both ends of the second recovery element 550 can act on the support leg 20 and the slide element 30, respectively. When the support leg 20 rotates from the deployed position to the folded position, the second recovery element 550 stores energy, and when the locking element 180 releases the support leg 20 in the folded position, the second recovery element 550 releases the stored energy, providing a torsional force that rotates the support leg 20 back to the deployed position.

[0029] The drive element 500 is located inside the slide element 30 and is rotatable together with the support leg 20. As shown in Figure 3, the guide assembly may include a traction element 40 and a rotational linkage assembly 510 to convert the rotation of the drive element 500 into a driving force to move the slide element 30 and the support leg 20 toward the interior of the base 10.

[0030] As shown in Figures 3 to 4A, the traction element 40 may include a wire 410, a jacket 420, and a limiting boss 430. The traction element 40 can transmit the movement of one end to the other end. Two limiting bosses 430 are provided on the base 10 and the slide element 30, respectively, to fix both ends of the jacket 420. The jacket 420 may be flexible to change its shape as the slide element 30 moves relative to the base 10. The wire 410 may be, for example, a steel wire placed inside the jacket 420 and extending from both ends of the jacket 420. One end of the wire 410 (as shown in Figure 4A) can be connected to the traction element connection 502 of the drive element 500 (for example, the front end of the drive element 500).

[0031] The outer surface of the drive element 500 can be formed in an arc shape, at least in part. The drive element 500 can form a traction element limiting groove 501. A portion of the wire 410 can be positioned within the traction element limiting groove 501 to prevent the wire 410 from swinging from side to side during movement.

[0032] The rotary linkage assembly 510 may include a pivot shaft 511, a connecting column 512, a rotary linkage 513, and a connecting lug 514. The rotary linkage 513 is rotatably connected to the base 10 via the pivot shaft 511. The other end of the wire 410 (as shown in Figure 3) can be connected to one end of the rotary linkage 513, i.e., the connecting column 512. The connecting lug 514 can be fixed to the slide bracket 340. The other end of the rotary linkage 513 can be connected to the connecting lug 514. The connecting lug 514 may have an elongated hole, and the other end of the rotary linkage 513 can be connected to the elongated hole so that the arc motion of the other end of the rotary linkage 513 is converted into linear motion of the slide bracket 340 along the base bracket 160. The presence of the rotary linkage 513 allows for the increase or decrease in the travel distance of the wire 410 by setting the length of the rotary linkage 513 provided on either side of the pivot shaft 511, thereby transmitting that travel distance to the slide bracket 340.

[0033] In other embodiments, this can be achieved by having the support legs 20 rotate at a smaller angle, thereby causing both the sliding element 30 and the support legs 20 to move a greater distance. For example, the rotary linkage assembly 510 may be replaced by a group of pulleys or other mechanisms.

[0034] As the support leg 20 rotates from the extended position to the folded position, the rotation of the support leg 20 drives one end of the wire 410 to move around the drive element 500 (the drive element 500 rotates together with the support leg 20), and this motion is transmitted to the other end of the wire 410, thereby pulling the connecting column 512 of the rotary linkage assembly 510, and subsequently rotating the rotary linkage assembly 510 around the pivot shaft 511, and finally the other end of the rotary linkage assembly 510 pulls the slide bracket 340 via the connecting lug 514, causing the slide element 30 and the support leg 20 to move together toward the interior of the base 10.

[0035] It is understood that the above process occurs in reverse when the support leg 20 rotates from the folded position to the unfolded position.

[0036] As described above, the base assembly 1 of this embodiment can be folded in just one step by rotating the support legs 20, making it easy to operate. At the same time, the magnitude of the applied force and the distance traveled by the sliding element 30 can be changed as needed.

[0037] The second embodiment of this disclosure will be described below, mainly with reference to Figures 7 to 9.

[0038] The second embodiment of this disclosure differs from the first embodiment mainly in the guide assembly. The differences between the second embodiment and the first embodiment will be described below, and you may find parts that are not described in the first embodiment.

[0039] As shown in Figures 7-9, the guide assembly of the second embodiment may include a towing rack 521 and a transmission gear 522 that mesh with each other. The towing rack 521 may be provided on the base 10 in the direction in which the slide bracket 340 slides relative to the base bracket 160. Specifically, the towing rack 521 may be centrally located at the bottom of the base 10 and oriented in the longitudinal direction of the base 10. The towing rack 521 can be fixed to the base 10, for example, by screws. A transmission gear 522 may be formed on the outer circumferential surface of the drive element 500 to constitute at least a portion of the arcuate outer circumferential surface of the drive element 500. The transmission gear 522 and the towing rack 521 are held in a meshed state and may have corresponding lengths. When the support leg 20 moves from the extended position to the folded position, the transmission gear 522 may be made to have a length equal to or greater than the distance it travels on the towing rack 521.

[0040] When the support leg 20 rotates from the extended position to the folded position, the support leg 20 drives the drive element 500 to rotate when folded. When the transmission gear 522 engages with the towing rack 521 and the drive element 500 rotates, the gear on the towing rack 521 generates an inward reaction force, driving the drive element 500 to move into the base 10. When the drive element 500 is connected to the support leg 20, the support leg 20 is driven to move inward into the base 10.

[0041] It is understood that the above process occurs in reverse when the support leg 20 rotates from the folded position to the unfolded position.

[0042] This embodiment has a stable structure, good driving feel, low operating resistance, and a long service life.

[0043] The third embodiment of this disclosure will be described below, mainly with reference to Figures 10 to 14.

[0044] The third embodiment of this disclosure differs from the first embodiment primarily in the guide assembly. The following mainly describes the differences between the third embodiment and the first embodiment, and you may find parts that are not described in the first embodiment.

[0045] As shown in Figures 10-14, the guide assembly of the third embodiment may include a traction rod 531. One end of the traction rod 531 is rotatably connected to the base bracket 160. The other end of the traction rod 531 is rotatably connected to the drive element 500.

[0046] As shown in Figure 12, the traction rod 531 may include a first rotating shaft 5311 and a second rotating shaft 5312, respectively, located at both ends of the traction rod 531, and the traction rod 531 may rotate around either end.

[0047] As shown in Figure 10, the fixed frame 120 may be provided with mounting lugs 532. Avoidance grooves 533 can be formed on the outer circumferential surface of the drive element 500. A first rotation hole 534 can be formed inside the avoidance groove 533. The first rotation hole 534 is located on the outer edge of the drive element 500, i.e., eccentrically positioned. A second rotation hole 535 can be formed in the mounting lug 532. The other end of the traction rod 531 can be located inside the avoidance groove 533. The first rotating shaft 5311 and the second rotating shaft 5312 are rotatably connected to the first rotation hole 534 and the second rotation hole 535, respectively. The avoidance grooves 533 can be formed so that the drive element 500 does not interfere with the traction rod 531 when the support leg 20 is in the deployed and folded positions.

[0048] Referring to Figures 11 and 14, as the support leg 20 rotates from the extended position to the folded position, the support leg 20 rotates together with the drive element 500, driving one end of the traction rod 531 to move in an arc around the outer surface of the drive element 500. Since the other end of the traction rod 531 is fixed to the base bracket 160 via the mounting lug 532, the rotation of the drive element 500 causes the slide element 30 to move inward toward the base 10 together with the support leg 20. Since the slide element 30 is sleeved in the base bracket 160 via the slide bracket 340, it is understood that the slide element 30 and the support leg 20 can only move along the base bracket 160.

[0049] It is understood that the above process occurs in reverse when the support leg 20 rotates from the folded position to the unfolded position.

[0050] In one embodiment, the base includes a base bracket, and the sliding element includes a sliding bracket, which is sleeved to the base bracket and slidable relative to the base bracket.

[0051] In one embodiment, the support leg extension structure includes a drive element and a guide assembly, wherein the drive element is located inside the sliding element and rotates together with the support leg, and the guide assembly converts the rotation of the drive element into power that moves the sliding element and the support leg together inside the base.

[0052] In one embodiment, the guide assembly includes a traction element and a swivel linkage, the traction element transmitting the movement of one end of the traction element to the other end of the traction element, the swivel linkage being rotatably connected to a base, one end of the swivel linkage being connected to the other end of the traction element, and the other end of the swivel linkage being connected to a slide bracket.

[0053] In one embodiment, the traction element includes a wire and a jacket, the jacket being fixed to a base and flexible, the wire being positioned within the jacket, with both ends of the wire extending out of the jacket and connected to one end of a swivel linkage and a support leg, respectively.

[0054] In one embodiment, the guide assembly includes a tow rack and a transmission gear. The tow rack and the transmission gear mesh with each other. The tow rack is mounted on the base along the sliding direction of the slide bracket relative to the base bracket, and the transmission gear is formed on the outer circumferential surface of the drive element.

[0055] In one embodiment, the guide assembly includes a traction rod, one end of which is rotatably connected to the base bracket, and the other end of which is rotatably connected to the drive element.

[0056] In one embodiment, a clearance groove is formed on the outer circumferential surface of the drive element, and the other end of the traction rod is located within the clearance groove.

[0057] In one embodiment, the base assembly further includes a protective cover positioned coaxially with the drive element to shield the gap between the support leg and the housing of the sliding element when the support leg is rotated to the folded position.

[0058] In one embodiment, the base assembly further includes a first recovery element for moving the sliding element toward the outside of the base, and a second recovery element for rotating the support leg from a folded position to an extended position.

[0059] In one embodiment, at least a portion of the outer surface of the drive element is formed in an arc shape.

[0060] This embodiment has a simple structure, fewer parts, low cost, and good operational quality.

[0061] The above technical proposal provides at least the following advantages:

[0062] 1. In the present invention, the support legs are provided to have at least an extended position and a folded position. When the child seat is in use, the support legs provide good support for the child seat, preventing it from tipping over. When not in use, the support legs can be conveniently stored by folding them into the lower part of the base, reducing the volume of the child seat and lowering transportation costs. Furthermore, the sliding element is retractably arranged on the base, and the support legs are rotatably connected to the sliding element. By extending and retracting together with the sliding element, the support legs can be conveniently attached and achieve good rotation. Moreover, the support legs can extend and retract in conjunction with the extension and retraction of the sliding element. When the support legs are not in use, the sliding element can be stored at the bottom of the base, shortening the length that the sliding element protrudes from the front end of the base, or preventing the sliding element from protruding from the base. This does not affect the child's ability to take their feet off the seat, improving the child's comfort, further reducing the volume of the child seat, and further lowering transportation costs. Furthermore, when the support legs swing and fold, the guide assembly can provide an inward reaction force, causing the support legs to retract synchronously inward, i.e., towards the base. After folding the support legs, the user does not need to push them back in, achieving complete folding and simplifying user operation. As a result, it offers easy operation and a good user experience, leading to higher satisfaction, differentiation from existing products, and a significant improvement in the product's market competitiveness.

[0063] 2. The slide bracket can slide a certain distance relative to the base bracket, so when not in use it can be reduced to a small size along the front-to-back direction, and when in use it it can be extended to the desired length along the front-to-back direction. The slide bracket is sleeved to the base bracket, and the slide bracket can move stably in a straight line relative to the base bracket, giving the sliding element a good sense of movement.

[0064] 3. Because a drive element and a guide assembly are provided, the rotation of the support leg cooperates with the movement of the slide element, and the guide assembly can transmit the rotation of the support leg to the slide element by increasing the stroke, meaning that the support leg rotates at a small angle, and a large contraction of the slide element and the support leg can be achieved.

[0065] 4. The child seat of the present disclosure includes a sliding element, to which support legs are rotatably connected, and the support legs extend and fold as the sliding element extends and retracts, thereby providing good safety when the safety seat is deployed in two usage modes and having a sufficiently small size when folded. In the first usage mode, the support legs are extended with the seat surface facing backward, or the support legs are opened with the seat surface facing forward, and in the second usage mode (i.e., booster mode), the seat faces forward and the support legs are folded. In the first usage mode, the seat can be used rearward when the support legs are extended, or forward when the support legs are folded. More specifically, the mode in which the seat surface is facing backward and the support legs are extended is suitable for children under 15 months and / or with a height of 0-105 cm, while the mode in which the seat faces forward and the support legs are folded is suitable for children 15 months and older and / or with a height of 76 cm to 105 cm, i.e., the "small child" mode. In the second mode of use (i.e., booster mode), the seat must face forward and the support legs must be folded. This mode is suitable for children with a height of 100 cm to 150 cm, i.e., the "big child" mode.

[0066] In the first mode of use, the ground contact position of the support legs after deployment can be adjusted by extending or retracting the sliding element, thereby ensuring that the upper end of the support legs is supported by the base, thereby firmly supporting the safety seat, preventing the safety seat from flipping over, and ensuring safety when using the safety seat. At the same time, there is ample space in the rear seat of the vehicle, and in the event of a collision, sufficient space in front and behind creates a good cushioning effect, providing good protection for small children. The large space also makes it easy to install the safety seat and convenient for putting small children in and taking them out. In the second mode of use, when the support legs are not needed, they can be folded and hidden under the base, and then attached to the vehicle seat for use with larger children. Larger children are usually taller than smaller children and therefore require more space. This disclosure not only increases the space in the rear seat of the vehicle to accommodate larger children, but also provides ample space in front and behind, creating a better cushion in the event of a collision, providing better safety protection for larger children, providing space for smaller children to rest their feet, enhancing comfort when riding in the safety seat, and ensuring the safety and stability of larger children. Furthermore, when not in use, the support legs are retracted and hidden, reducing the overall dimensions of the safety seat, decreasing its packaging volume, and lowering transportation costs. Additionally, the overall dimensions of the safety seat can be altered by the sliding element, i.e., the extension and folding of the support legs. While the size of the rear seat space varies depending on the vehicle type, this disclosure can be applied to different types of vehicles, significantly expanding the application range of the safety seat. Moreover, the safety seat can be divided into two usage modes: one for small children and one for older children (multiple uses for one seat), further expanding the usability of the safety seat. Thus, users only need to purchase one safety seat, significantly reducing their usage costs, providing them with better appeal, differentiating the product, and greatly strengthening its market competitiveness.

[0067] As described above, after considering the specification and implementing the disclosure, a person skilled in the art will readily come up with other embodiments of the disclosure. The disclosure aims to cover all variations, uses, or modifications of the disclosure, including common sense or general technical means known in the art not disclosed herein, in accordance with the general principles of the disclosure. Furthermore, the specification and its embodiments are merely examples, and the scope and spirit of the disclosure are indicated by the claims of the disclosure.

[0068] While this disclosure has been described with reference to examples of typical embodiments, the terminology used is illustrative and not limiting. Since this disclosure can be embodied in various ways without departing from the spirit and substance of this disclosure, the embodiments described above should be interpreted in the broadest sense within the scope of the claims, and not limited to any of the details described herein. Therefore, all variations included within the scope of the claims or their equivalents should be covered by the claims.

Claims

1. A base assembly comprising a base, a sliding element, support legs, and a support leg extension structure, The sliding element is retractably arranged on the base, The support legs are rotatably connected to the sliding element and extend and retract together with the sliding element, and the support legs have an extended position when in use and a folded position when not in use. The support leg extension structure moves the sliding element and the support leg inward from the base in accordance with the rotation of the support leg from the extended position to the folded position. The support leg extension structure includes a drive element and a guide assembly, the drive element being positioned within the slide element and rotating together with the support leg, and the guide assembly being capable of converting the rotation of the drive element into an actuation force that moves the slide element and the support leg together inward from the base. The guide assembly includes a traction element and a swivel linkage, wherein the traction element transmits the motion of one end of the traction element to the other end of the traction element, the swivel linkage is rotatably connected to the base, one end of the swivel linkage is connected to the other end of the traction element, and the other end of the swivel linkage is connected to the slide element. A base assembly characterized by the following features.

2. The base includes a base bracket, the sliding element includes a sliding bracket, the sliding bracket is sleeved to the base bracket and slidable relative to the base bracket, the sliding element extends from the base and at least a portion of it can be retracted into the base. The base assembly according to feature 1.

3. The traction element includes a wire and a jacket, the jacket being fixed to the base and flexible, the wire being positioned inside the jacket, and both ends of the wire extending from the jacket and connected to one end of the rotation linkage and the support leg, respectively. The base assembly according to feature 1.

4. The guide assembly includes a traction rod, one end of which is rotatably connected to the base bracket, and the other end of which is rotatably connected to the drive element. The base assembly according to claim 2, characterized in that it is as described above.

5. A groove is formed on the outer surface of the drive element, and the other end of the traction rod is located within the groove. The base assembly according to feature 4.

6. The base assembly further includes a cover, which is coaxially positioned with the drive element and shields the gap between the support leg and the housing of the slide element when the support leg rotates to the folded position. The base assembly according to feature 1.

7. The outer circumferential surface of the drive element is formed in an arc shape, at least partially. The base assembly according to feature 1.

8. The base assembly further includes a first recovery element for moving the sliding element outward from the base, and a second recovery element for rotating the support leg from the folded position to the extended position. The base assembly according to feature 1.

9. A base assembly comprising a base, a sliding element, support legs, and a support leg extension structure, The sliding element is retractably arranged on the base, The support legs are rotatably connected to the sliding element and extend and retract together with the sliding element, and the support legs have an extended position when in use and a folded position when not in use. The support leg extension structure moves the sliding element and the support leg inward from the base in accordance with the rotation of the support leg from the extended position to the folded position. The support leg extension structure includes a drive element and a guide assembly, the drive element being positioned within the slide element and rotating together with the support leg, and the guide assembly being capable of converting the rotation of the drive element into an actuation force that moves the slide element and the support leg together inward from the base. The guide assembly includes a tow rack and a transmission gear that mesh with each other, the tow rack being positioned on the base along the sliding direction of the sliding element relative to the base, and the transmission gear being formed on the outer circumferential surface of the drive element. A base assembly characterized by the following features.

10. The base includes a base bracket, the sliding element includes a sliding bracket, the sliding bracket is sleeved to the base bracket and slidable relative to the base bracket, the sliding element extends from the base and at least a portion of it can be retracted into the base. The base assembly according to feature 9.

11. The guide assembly includes a traction rod, one end of which is rotatably connected to the base bracket, and the other end of which is rotatably connected to the drive element. The base assembly according to claim 10.

12. A groove is formed on the outer surface of the drive element, and the other end of the traction rod is located within the groove. The base assembly according to feature 11.

13. The base assembly further includes a cover, which is coaxially positioned with the drive element and shields the gap between the support leg and the housing of the slide element when the support leg rotates to the folded position. The base assembly according to feature 9.

14. The outer circumferential surface of the drive element is formed in an arc shape, at least partially. The base assembly according to feature 9.

15. The base assembly further includes a first recovery element for moving the sliding element outward from the base, and a second recovery element for rotating the support leg from the folded position to the extended position. The base assembly according to feature 9.

16. A base assembly according to any one of claims 1 to 15, and a seat disposed on the base assembly, including A child car seat characterized by the following features.

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