Base assembly and child car safety seat

Abstract

The application discloses a base assembly and a child car safety seat. The base assembly comprises a base, a supporting leg provided with a gear, and a sliding piece telescopically arranged on the base and provided with a rack. The gear is engaged with the rack, so that the movement of the sliding piece to an extended position is linked with the pivoting of the supporting leg to an unfolded position, and the movement of the sliding piece to a retracted position is linked with the pivoting of the supporting leg to a folded position. The base assembly and the child car safety seat provided by the application simplify the operation of the user, are convenient to operate, and have good user experience.

Description

Technical Field

[0001] This application relates to the field of child car seat technology, and in particular to an easy-to-use base assembly and a child car seat. Background Technology

[0002] Child safety seats have become an essential mode of transportation for children. One type of child safety seat incorporates a support leg structure in its base to enhance stability and safety. When in use, the support leg extends and touches the ground, providing excellent support for the child safety seat and preventing it from tipping over. When not in use, the support leg can be folded back into the base, reducing its size.

[0003] However, child safety seats with a support leg structure have a protrusion at the front of the base. This protrusion is used to install the pivot support leg structure. When the support leg is not needed, this protrusion becomes obstructive, affecting the child's riding experience and increasing the size of the child safety seat, thus increasing transportation costs.

[0004] Although a child safety seat with a retractable support leg structure has emerged to solve the above problems, its folding and retraction requires two steps: first, the support leg structure must be folded, and then the support leg structure must be pushed to retract completely. This operation is cumbersome and results in a poor user experience. Summary of the Invention

[0005] The purpose of this application is to provide an easy-to-use base assembly and a child car safety seat.

[0006] To achieve the above objectives, in one aspect, this application provides a base assembly comprising: a base; a support leg with a gear; and a slider telescopically disposed on the base and provided with a rack; wherein the gear meshes with the rack, such that the movement of the slider to an extended position is pivotally linked to the pivoting of the support leg to an unfolded position, and the movement of the slider to a retracted position is pivotally linked to the pivoting of the support leg to a folded position.

[0007] In one embodiment, the base assembly further includes a conversion structure, a first end of which is connected to the slider, a second end of which is connected to the base, and the rack is fixed at a position between the first end and the second end, wherein the conversion structure extends or shortens accordingly in response to an increase or decrease in the distance between the slider and the base.

[0008] In one embodiment, the conversion structure consists of one or more X-shaped units.

[0009] In one embodiment, each X-shaped unit consists of two plates pivotally connected to each other.

[0010] In one embodiment, the base assembly further includes a first return member configured to constantly bias the support foot toward the unfolded position.

[0011] In one embodiment, the base assembly further includes a second return member configured to constantly bias the slider toward the unfolded position.

[0012] In one embodiment, the second return member is a tension spring, and one end of the second return member is fixed to the base, while the other end of the second return member is fixed to the slider.

[0013] In one embodiment, the base includes a locking element that operatively locks the support leg in the folded position.

[0014] In one embodiment, the base includes a stepped portion, wherein when the support foot is in the folded position, the stepped portion prevents the slider from moving to the unfolded position by abutting against the support foot.

[0015] On the other hand, this application provides a child car safety seat, which includes a base assembly and a seat disposed on the base assembly, wherein the base assembly is the base assembly described above.

[0016] By adopting the above technical solution, this application has the following advantages:

[0017] 1. In this application, by setting the support leg to have at least one extended position and one folded position, the support leg provides excellent support for the child car seat when in use, preventing the car from tipping over. When not in use, it can be folded back into the bottom of the base for easy storage, reducing the size of the child car seat and lowering transportation costs. Furthermore, by incorporating a retractable sliding member on the base, and pivoting the support leg onto the sliding member and allowing it to extend and retract with the member, the installation of the support leg is convenient, and it also allows for good pivoting. The sliding member retracts into the base when the support leg is not in use. The design minimizes the length of the slider protruding from the front of the base, or eliminates the slider altogether, thus ensuring it doesn't obstruct the child's foot placement and improving the child's riding experience. This also further reduces the size of the child car seat, lowering transportation costs. Furthermore, the meshing of gears and racks allows the slider's extension to be linked to the pivoting of the support leg in the unfolded position, and the slider's retraction to be linked to the pivoting of the support leg in the folded position. This eliminates the need for the user to manually retract the support leg after folding it, simplifying operation, enhancing user experience, and increasing satisfaction. This differentiates the product from existing products and significantly improves its market competitiveness.

[0018] 2. The base assembly of this application is equipped with gears and racks, which makes the linkage between the support feet and the sliding parts have excellent connection quality and operation feel.

[0019] 3. The base assembly of this application is provided with a conversion structure, such that the extension distance of the rack relative to the base is different from the extension distance of the support foot and the slider relative to the base. As a result, the rack can move relative to the gear, thereby realizing the linkage between the support foot and the slider.

[0020] 4. The base assembly conversion structure of this application is composed of X-type units, which are reliable and have a large telescopic range. The desired telescopic range can be achieved by changing the number of X-type units that make up the conversion structure. In addition, the conversion structure composed of X-type units is easy to assemble.

[0021] 5. The base of this application has a locking mechanism, which prevents the support legs from being accidentally opened when the child car seat is not in use, thus ensuring the reliability of the child car seat.

[0022] 6. The base of this application has a stepped portion, which prevents the sliding part from accidentally extending out of the base when the child car seat is not in use, thus ensuring the reliability of the child car seat.

[0023] 7. By setting up a receiving groove, after the support legs are folded into the bottom of the base, the lower surface of the child car seat is flatter, making full use of the base space and further saving space. Attached Figure Description

[0024] Various objects, features, and advantages of the invention will become more apparent from the following detailed description of preferred embodiments of the invention, taken in conjunction with the accompanying drawings. The drawings are merely illustrative of the invention and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:

[0025] Figure 1 This is a perspective view of the base assembly of this application, wherein the supporting legs of the base assembly are in the unfolded position;

[0026] Figure 2 This is a perspective view of the base assembly of this application, wherein the supporting legs of the base assembly are in the folded position;

[0027] Figure 3 This is a perspective view of the base assembly of this application, wherein the support legs of the base assembly are in the unfolded position and some components are removed to show the internal structure of the base assembly;

[0028] Figure 4 This is a perspective view of some components of the base assembly of this application;

[0029] Figure 5 This is a perspective view of some components of the base assembly of this application, and... Figure 4 compared to, Figure 5 The upper casing has been removed;

[0030] Figure 6 This is a side sectional view of the base assembly of this application, wherein the support legs of the base assembly are in the folded position;

[0031] Figure 7 yes Figure 6 A magnified view of part A;

[0032] Figure 8 yes Figure 6 A magnified view of part B;

[0033] Figure 9 This is a bottom perspective view of the base assembly of this application, wherein the supporting legs of the base assembly are in the folded position;

[0034] Figure 10 This is a side sectional view of the base assembly of this application, wherein the support legs of the base assembly are close to the unfolded position;

[0035] Figure 11 yes Figure 10A magnified view of part C;

[0036] Figure 12 This is a partial top view of the base assembly of this application, wherein the slider of the base assembly is in the extended position and some components are removed to show the internal structure of the base assembly;

[0037] Figure 13 This is a partial top view of the base assembly of this application, wherein the slider of the base assembly is in the extended position and some components are removed to show the internal structure of the base assembly; and

[0038] Figure 14 This is a partial top view of the base assembly of this application, wherein the slider of the base assembly is in the retracted position and some components are removed to show the internal structure of the base assembly.

[0039] List of reference numerals in the attached diagram:

[0040] Base component 1

[0041] Base 10

[0042] 120 Fixture

[0043] Turntable 130

[0044] 160 base support

[0045] Container 170

[0046] Locking part 180

[0047] Step section 190

[0048] Support foot 20

[0049] Protective cover 250

[0050] Locking hole 280

[0051] Slider 30

[0052] Sliding bracket 340

[0053] Sliding groove 341

[0054] Support leg bracket 342

[0055] Sliding groove 3421

[0056] 350 housing

[0057] Upper casing 351

[0058] Lower housing 352

[0059] Bushing 360

[0060] First reply 520

[0061] Second reply letter 530

[0062] Rack 540

[0063] Gear 550

[0064] Pivot shaft 80

[0065] Transformation Structure 90

[0066] First end 910

[0067] Second end 920

[0068] Connecting part 930 Detailed Implementation

[0069] To more clearly illustrate the overall concept of this application, a detailed explanation will be provided below with reference to the accompanying drawings.

[0070] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0071] Furthermore, it should be understood in the description of this application that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0072] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two entities connected are not linked by an intermediate structure, but are simply connected to form a whole. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0073] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0074] This application provides a child car safety seat that can be installed in a car seat for infants or children to ride in, and to ensure the safety of the occupant.

[0075] Figure 1 This is a perspective view of the base assembly of this application, wherein the supporting legs of the base assembly are in the unfolded position. Figure 2 This is a perspective view of the base assembly of this application, wherein the supporting legs of the base assembly are in the folded position.

[0076] See Figures 1-2 A child car seat may have a base assembly 1 and a seat (not shown). The base assembly 1 may have a base 10, support feet 20, and a slider 30. The base 10 may have a turntable 130. The turntable 130 is detachably mounted on the upper surface of the base 10 and is rotatable relative to the rest of the base 10. The seat may be mounted on the turntable 130 of the base 10 and thus can rotate with the turntable 130. The seat has at least one forward-facing position and one rearward-facing position. The forward-facing position may be the seat facing forward of the vehicle, and the rearward-facing position may be the seat facing rearward of the vehicle. The forward-facing position may be suitable for older children, for example, and the rearward-facing position may be suitable for younger infants, for example, but this application is not limited thereto.

[0077] The sliding member 30 is retractably mounted on the base 10, and the support leg 20 is pivotally connected to the sliding member 30 and extends and retracts with it. The support leg 20 is rotatably and retractably connected to the base 10 via the sliding member 30. When the support leg 20 is in use, the sliding member 30 extends out of the base 10 while the support leg 20 pivotally unfolds to contact the ground (i.e., the floor inside the car). This prevents the child car seat from overturning during a collision. When the support leg 20 is not needed, the sliding member 30 retracts into the base 10 while the support leg 20 pivotally folds back. This reduces the overall size of the child car seat, making it easier to store and use.

[0078] Figure 3This is a perspective view of the base assembly of this application, wherein the support legs of the base assembly are in the unfolded position and some components are removed to show the internal structure of the base assembly. Figure 4 This is a perspective view of some components of the base assembly of this application. Figure 5 This is a perspective view of some components of the base assembly of this application, and... Figure 4 compared to, Figure 5 The upper casing has been removed.

[0079] The base 10 may have a mounting bracket 120 (see...) Figure 12 The mounting bracket 120 and the base bracket 160 can be used as load-bearing components. The base bracket 160 can be a tubular component. The mounting bracket 120 can extend laterally along the base 10 and cross over the base bracket 160 from above. The base bracket 160 can have a symmetrical structure, but this application is not limited thereto.

[0080] The sliding member 30 may include a sliding bracket 340 slidably fitted onto the base bracket 160 and a housing 350 connected to the sliding bracket 340. The sliding member 30 may also include a bushing 360. The bushing 360 may be disposed between the base bracket 160 and the sliding bracket 340 to prevent the sliding bracket 340 from sliding directly on the base bracket 160. The bushing 360 is used to reduce the friction between the base bracket 160 and the sliding bracket 340, so that the sliding bracket 340 can slide smoothly relative to the base bracket 160.

[0081] The housing 350 may consist of an upper housing 351 and a lower housing 352, but this application is not limited thereto. The sliding bracket 340 may include a support foot bracket 342 extending into the housing 350. The housing 350 may be fixed to the support foot bracket 342 of the sliding bracket 340 (e.g., by rivets). The sliding bracket 340 is provided with a sliding groove 341, and the base bracket 160 is provided with a sliding rod (not shown). Alternatively, the sliding bracket 340 is provided with a sliding rod, and the base bracket 160 is provided with a sliding groove 341. Both the sliding rod 161 and the sliding groove 341 may be provided symmetrically in twos.

[0082] Figure 6 This is a side sectional view of the base assembly of this application, wherein the support legs of the base assembly are in the folded position. Figure 7 yes Figure 6 A magnified view of part A. Figure 8 yes Figure 6 A magnified view of part B. Figure 9 This is a bottom perspective view of the base assembly of this application, wherein the supporting legs of the base assembly are in the folded position.

[0083] The support leg 20 may be equipped with a gear 550. The sliding member 30 may be equipped with a rack 540. The gear 550 and the rack 540 mesh, so that the movement of the sliding member 30 to the extended position is linked with the pivoting of the support leg 20 to the unfolded position, and the movement of the sliding member 30 to the retracted position is linked with the pivoting of the support leg 20 to the folded position.

[0084] The extended position can refer to the slider 30 moving forward ( Figure 6 The left side of the slider 30 protrudes from the base 10, and the retracted position can refer to the slider 30 moving backward. Figure 6 The right side of the base 10 does not protrude or is substantially not protruding from the position of the base 10.

[0085] The unfolded position can refer to the position where the support leg 20 is pivoted to be perpendicular or substantially perpendicular to the bottom surface of the base 10, and the folded position can refer to the position where the support leg 20 is pivoted to be neither protruding nor substantially protruding from the bottom surface of the base 10.

[0086] A protective cover 250 may be provided inside the housing 350. The pivot shaft 80 may pass through the sliding bracket 340, the protective cover 250, and the gear 550 to achieve pivoting. The protective cover 250 may pivot together with the support leg 20 to block the gap created when the support leg 20 is folded, preventing pinching.

[0087] Base assembly 1 may include a first return piece 520 (see...) Figure 12 A first return element 520 (e.g., a torsion spring) may be disposed on the pivot shaft 80. The first return element 520 is configured to constantly bias the support leg 20 toward the extended position. Thus, the first return element 520 assists in the extension of the support leg 20. The base assembly 1 may include a second return element 530. The second return element 530 (e.g., a tension spring) may be disposed within the base 10. One end of the second return element 530 may be fixed to the base 10, and the other end of the second return element 530 may be fixed to the slider 30. The second return element 530 is configured to constantly bias the slider 30 toward the extended position. That is, the second return element 530 allows the support leg 20 and the slider 30 to automatically extend forward toward the base assembly 1. The first return element 520 and the second return element 530 are optional, not required. The number of second return elements 530 may be one, two, or other numbers, and this application is not limited thereto. The first return element 520 may be any elastic return element other than a torsion spring. The second return element 530 may be any elastic return element other than a tension spring.

[0088] See Figures 8-9The base 10 may also include a receiving groove 170. When the support leg 20 is folded, it can be received within the receiving groove 170, so that the folded support leg 20 does not protrude from the bottom surface of the base 10, or protrudes only slightly from the bottom surface of the base 10. The base 10 may also include a locking member 180. The locking member 180 may be in the form of a push button, which is movably disposed on the bottom surface of the base 10, for example, the locking member 180 is along the longitudinal direction of the base assembly 1 ( Figure 8 The support leg 20 is movable (in the left and right direction) and can be locked in place by locking holes 280 within the receiving groove 170. The locking member 180 prevents the support leg 20 from accidentally rotating out to the unfolded position.

[0089] The base 10 may also include a step portion 190. The step portion 190 may be formed as a sidewall of the receiving groove 170. When the support leg 20 is in the folded position, the step portion 190 prevents the slider 30 from moving to the unfolded position by abutting against the support leg 20.

[0090] Figure 10 This is a side sectional view of the base assembly of this application, wherein the support legs of the base assembly are near the unfolded position. Figure 11 yes Figure 10 A magnified view of part C. Figure 12 This is a partial top view of the base assembly of this application, wherein the slider of the base assembly is in the extended position and some components are removed to show the internal structure of the base assembly. Figure 13 This is a partial top view of the base assembly of this application, wherein the slider of the base assembly is in the extended position and some components are removed to show the internal structure of the base assembly, and Figure 14 This is a partial top view of the base assembly of this application, wherein the slider of the base assembly is in the retracted position and some components are removed to show the internal structure of the base assembly.

[0091] The base assembly 1 may also include a conversion structure 90. The first end 910 of the conversion structure 90 ( Figure 11 The left end of the transition structure 90 can be connected to the slider 30. The second end 920 of the transition structure 90 ( Figure 11 The right end of the conversion structure 90 can be connected to the base 10. Specifically, the first end 910 of the conversion structure 90 can be connected to the support leg bracket 342, and the second end 920 of the conversion structure 90 can be connected to the fixing bracket 120. The second end 920 of the conversion structure 90 ( Figure 11 The right end of the slide 30 can be connected to the base 10. The rack 540 can be fixed to the conversion structure 90. Specifically, the rack 540 can be fixed at a position between the first end 910 and the second end 920 (i.e., the connecting part 930). The conversion structure 90 extends or shortens accordingly in response to an increase or decrease in the distance between the slide 30 and the base 10.

[0092] The transformation structure 90 can be composed of one or more X-type units (such as...) Figure 12 (Clearly shown in the diagram). In the case where the conversion structure 90 consists of multiple X-type units, the multiple X-type units are connected to each other sequentially. Each X-type unit may consist of two plates pivotally connected to each other. The two plates of each X-type unit may be pivotally connected to each other by means of a pivot axis. The aforementioned plates may be iron plates, but this application is not limited thereto. As an example, the conversion structure 90 consists of 3 X-type units, with the rack 540 fixed on the left side (as shown in the diagram). Figure 12 At the pivot axis of one X-shaped unit (as shown).

[0093] The support leg bracket 342 and the fixing frame 120 each have two elongated holes. The first end 910 of the conversion structure 90 (containing the ends of the two plates of one X-shaped unit) is connected to the two elongated holes of the support leg bracket 342. The second end 920 of the conversion structure 90 (containing the ends of the two plates of one X-shaped unit) is connected to the two elongated holes of the fixing frame 120.

[0094] Each of the elongated holes on the support foot bracket 342 is used to prevent the first end 910 of the conversion structure 90 from moving relative to the support foot bracket 342 along the longitudinal direction of the base assembly 1. Figure 12 The first end 910 of the conversion structure 90 can move relative to the support foot bracket 342 in the lateral direction of the base assembly 1 (in the left and right directions), and allows the first end 910 of the conversion structure 90 to move relative to the support foot bracket 342 in the lateral direction of the base assembly 1 (in the left and right directions). Figure 12 Move a certain distance in the up and down direction.

[0095] Each of the elongated holes on the mounting bracket 120 is used to prevent the second end 920 of the conversion structure 90 from moving relative to the mounting bracket 120 along the longitudinal direction of the base assembly 1. Figure 12 The second end 920 of the conversion structure 90 can move relative to the fixing frame 120 in the lateral direction of the base assembly 1 (in the left and right direction), and allows the second end 920 of the conversion structure 90 to move relative to the fixing frame 120 in the lateral direction (in the left and right direction). Figure 12 Move a certain distance in the up and down direction.

[0096] See Figure 5 A sliding groove 3421 may be formed on the support foot bracket 342. A portion of the connecting part 930 may be located in the sliding groove 3421. The sliding groove 3421 prevents the connecting part 930 from moving laterally ( Figure 12 The vertical direction of the connecting part 930 is allowed to move, and the connecting part 930 is allowed to move longitudinally. Figure 12 Move a certain distance in the left and right directions.

[0097] The following describes the specific operation process of base component 1.

[0098] When the support foot 20 needs to be used, first unlock the locking element 180. For example, this can be done by pressing or moving it in the rearward direction. Figure 8The locking member 180 is unlocked by pushing it from the right side of the base 10. Then, since the support leg 20 is no longer locked by the locking member 180, the support leg 20 pivots to the unfolded position and leaves the receiving groove 170 under the action of the first return member 520. Next, since the support leg 20 leaves the receiving groove 170, the step portion 190 no longer abuts against the support leg 20. At this time, the slider 30 moves to the extended position under the action of the second return member 530. As an example, the rack 540 and the gear 550 can be set to engage when the step portion 190 no longer abuts against the support leg 20, and the support leg 20 and the slider 30 begin to move synchronously, but this application is not limited to this. Next, as the support leg 20 pivots to the unfolded position and the slider 30 moves to the extended position, the rack 540 moves relative to the gear 550. The distance the rack 540 moves relative to the gear 550 and the distance the slider 30 moves relative to the base 10 will conform to a specific proportional relationship (which will be explained in detail below). Finally, when the support leg 20 pivots to the unfolded position and the slider 30 moves to the extended position, the support leg 20 stops pivoting further and the slider 30 stops moving further. This stopping can be achieved, for example, by preventing further movement of the connecting portion 930 through the sliding groove 3421, or by preventing further movement of the first end 910 and / or the second end 920 of the conversion structure 90 through the elongated holes on the support leg bracket 342 and / or the fixing bracket 120, or by a combination of the above processes.

[0099] When the support foot 20 is not needed, the operator can push it to pivot in the folding direction. The pivoting of the support foot 20 drives the gear 550 to rotate. The rotation of the gear 550 causes the rack 540 to move. Since the conversion structure 90 is fixedly connected to the rack 540, the movement of the rack 540 causes the conversion structure 90 to shorten. Since the first end 910 of the conversion structure 90 is connected to the support foot bracket 342, the shortening of the conversion structure 90 causes the slider 30 to move to the retracted position. The conversion structure 90 can amplify the movement distance of the slider 30 and the support foot 20. When the support foot 20 pivots into the receiving groove 170, the support foot 20 triggers the locking member 180 to lock the support foot 20, preventing the support foot 20 from unfolding when the operator releases it. At the same time, the step portion 190 also abuts against the support foot 20 to prevent the slider 30 from extending when the operator releases the support foot 20.

[0100] The conversion structure 90 extends or retracts as the slider 30 moves relative to the base 10. Figure 12Taking the case in the example, the conversion structure 90 has three X-shaped units, and the rack 550 is fixed at the pivot of the leftmost X-shaped unit. Thus, when the slider 30 moves a distance L relative to the base 10 in a direction away from the base 10, the conversion structure 90 extends by a corresponding distance L. At this time, since the rack 550 is fixed only 2.5 X-shaped elements away from the base 10, the rack 550 moves 5 / 6L away from the base 10. Since the gear 540 is connected to the slider 30 via the pivot shaft 80, the gear 540 moves a distance L relative to the base 10 in a direction away from the base 10. That is, the gear 540 moves 1 / 6L relative to the rack 550 in a direction away from the base 10. During the pivoting of the support leg 20, because the gear 540 moves relative to the rack 550, the pivoting of the support leg 20 can cause the slider 30 to move, and vice versa.

[0101] It should be noted that the proportional relationships described above are merely examples, and the ratio of the movement distance of the rack 540 relative to the gear 550 to the movement distance of the slider 30 relative to the base 10 can be adjusted as needed. This can be achieved, for example, by changing the position in which the rack 550 is fixed to the conversion structure 90. Furthermore, the change in the aforementioned proportional relationships can also be achieved in other ways.

[0102] The child car safety seat may have a first use mode and a second use mode. In the first use mode, the slider 30 extends and the support foot 20 unfolds to form a ground support. In the second use mode, the slider 30 retracts and the support foot 20 folds into the bottom of the base 10.

[0103] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0104] Although this application has been described with reference to exemplary embodiments, the terminology used is descriptive and exemplary, and not restrictive. Because this application can be embodied in many forms without departing from its spirit and essence, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted in the broadest possible sense within the scope defined by the claims. Therefore, all variations falling within the scope of the claims or their equivalents should be covered by the claims.

Claims

1. A base assembly, characterized in that, The base assembly includes: Base; Support legs, equipped with gears; and A sliding member is telescopically mounted on the base and is provided with a rack; The gear meshes with the rack, such that the movement of the slider to the extended position is linked to the pivoting of the support foot to the unfolded position, and the movement of the slider to the retracted position is linked to the pivoting of the support foot to the folded position.

2. The base assembly according to claim 1, characterized in that, The base assembly further includes a conversion structure, a first end of which is connected to the slider, a second end of which is connected to the base, and the rack is fixed at a position between the first end and the second end. The conversion structure extends or shortens in response to an increase or decrease in the distance between the slider and the base.

3. The base assembly according to claim 2, characterized in that, The conversion structure consists of one or more X-type units.

4. The base assembly according to claim 3, characterized in that, Each of the X-shaped units consists of two plates pivotally connected to each other.

5. The base assembly according to claim 1, characterized in that, The base assembly also includes a first return element configured to constantly bias the support leg toward the unfolded position.

6. The base assembly according to claim 1, characterized in that, The base assembly further includes a second return member configured to constantly bias the slider toward the unfolded position.

7. The base assembly according to claim 6, characterized in that, The second return element is a tension spring, and one end of the second return element is fixed to the base, while the other end of the second return element is fixed to the slider.

8. The base assembly according to claim 1, characterized in that, The base includes a locking element that operably locks the support leg in the folded position.

9. The base assembly according to claim 8, characterized in that, The base includes a stepped portion, wherein when the support leg is in the folded position, the stepped portion prevents the slider from moving to the unfolded position by abutting against the support leg.

10. A child car safety seat, comprising a base assembly and a seat disposed on the base assembly, characterized in that, The base assembly is the base assembly as described in any one of claims 1 to 9.

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