Patent Description:
With the improvement of people's awareness of driving safety, child safety seats have become a must-have for infants and children in vehicles. To prevent the child safety seat from moving due to inertia in a case such as sudden braking, a support leg is generally arranged at the front end of the base of the child safety seat, to support and fix the position of the child safety seat. To allow the support leg to be received in the base when not in use and to be effectively supported by a chassis of a vehicle when in use, the support leg is generally designed as a telescopic structure. However, telescopic support leg structures in the prior art involve a large number of parts, a heavy weight, and complicated installation operations. <CIT> discloses a telescopic support leg.

To solve at least one of the above problems, the present invention first provides a telescopic support leg structure, including a base and a support leg pedestal slidably connected to the base, where a reinforcing rod is mounted on the base, the support leg pedestal is slidably connected to the reinforcing rod, and a pressing block and a support block are arranged at an end of the reinforcing rod connected to the support leg pedestal; and the telescopic support leg structure further includes a connecting rod extending through the support leg pedestal, where the connecting rod abuts against an upper surface of the reinforcing rod, a first rail configured to engage with the connecting rod is formed between the support block and the upper surface of the reinforcing rod, the support leg pedestal is provided with a first flange, and a second rail configured to engage with the first flange is formed between the pressing block and the base.

Optionally, two reinforcing rods are provided, and the two reinforcing rods are symmetrically arranged on a left side and a right side of the support leg pedestal, respectively.

Optionally, the base is provided with a third rail, and a sliding column configured to engage with the third rail is arranged on the support leg pedestal.

Optionally, the sliding column is connected to a fastener configured to prevent the sliding column from disengaging from the third rail.

Optionally, the reinforcing rod is made of a metal.

Optionally, the support block and the pressing block are integrally formed with the reinforcing rod.

Optionally, the support block has a U-shaped slot with an opening facing rearward, and when the support leg pedestal is pulled forward to an outermost position, the connecting rod is engaged into the U-shaped slot.

Optionally, the support leg pedestal is provided with a second flange, and when the support leg pedestal is pulled forward to an outermost position, the second flange abuts against an upper surface of the pressing block.

Optionally, a limiting bump configured to engage with the second flange is further arranged on the upper surface of the pressing block.

Compared with the prior art, in the telescopic support leg structure of the present disclosure, the reinforcing rod is arranged between the base and the support leg pedestal, and the pressing block and the support block are arranged on the reinforcing rod, so that the first rail is formed between the support block and the reinforcing rod, and the second rail is formed between the pressing block and the base. The first rail and the second rail arranged one above the other are slidably engaged with the connecting rod and the first flange on the support leg pedestal, respectively. In this way, the support leg pedestal can be telescoped forward and backward relative to the base. Such a structure having two layers of rails enables a more stable and reliable telescoping process of the support leg pedestal, and reduces the shaking gap between the support leg pedestal and the base, and involves a small number of parts, a reduced overall weight, and more easy and convenient installation operations.

In addition, the present invention provides a child safety seat, including the telescopic support leg structure as described above.

Compared with the prior art, the child safety seat of the present invention has the same advantages as those of the telescopic support leg structure compared with the prior art, so the details will not be repeated herein.

base; <NUM>. third rail; <NUM>. support leg pedestal; <NUM>. first flange; <NUM>. sliding column; <NUM>. fastener; <NUM>. second flange; <NUM>. reinforcing rod; <NUM>. pressing block; <NUM>. limiting bump; <NUM>. support block; <NUM>. U-shaped slot; <NUM>. connecting rod; <NUM>. first rail; <NUM>. second rail; <NUM>. support leg.

To make the objectives, technical features, and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the description of the present invention, it should be understood that orientation or position relationships indicated by the terms such as "upper" and "lower" are orientation or position relationships based on the normal use of the product.

The terms "first" and "second" are used herein for descriptive purposes, and are not intended to indicate or imply relative importance or implicitly point out the number of the indicated technical features. Therefore, the feature defined by "first" or "second" may explicitly or implicitly include at least one such feature. In the drawings of the embodiments of the present disclosure, a coordinate system XYZ is provided, where the positive direction of the X axis represents left, the negative direction of the X axis represents right, the positive direction of the Y axis represents front, the negative direction of the Y axis represents rear, the positive direction of the Z axis represents up, and the negative direction of the Z axis represents down.

An embodiment of the present invention provides a telescopic support leg structure. Referring to <FIG>, <FIG>, <FIG>, and <FIG>, the telescopic support leg structure includes a base <NUM> and a support leg pedestal <NUM> slidably connected to the base <NUM>. A reinforcing rod <NUM> is mounted on the base <NUM>. The support leg pedestal <NUM> is slidably connected to the reinforcing rod <NUM>. A pressing block <NUM> and a support block <NUM> are arranged at an end of the reinforcing rod <NUM> connected to the support leg pedestal <NUM>. The telescopic support leg structure further includes a connecting rod <NUM> extending through the support leg pedestal <NUM>. The connecting rod <NUM> abuts against an upper surface of the reinforcing rod <NUM>. A first rail <NUM> configured to engage with the connecting rod <NUM> is formed between the support block <NUM> and the upper surface of the reinforcing rod <NUM>. The support leg pedestal <NUM> is provided with a first flange <NUM>. A second rail <NUM> configured to engage with the first flange <NUM> is formed between the pressing block <NUM> and the base <NUM>.

The reinforcing rod <NUM> is fixedly connected to the base <NUM> through a fastener <NUM> such as a screw, and the support leg pedestal <NUM> can move forward and backward relative to the base <NUM> and the reinforcing rod <NUM>. The connecting rod <NUM> is of a smooth cylindrical structure, and during the forward and backward movement process, the support leg pedestal <NUM> can drive the connecting rod <NUM> to move synchronously in the first rail <NUM>. The first flange <NUM> is located below the connecting rod <NUM>, the second rail <NUM> is formed between a lower surface of the pressing block <NUM> and an upper surface of the base <NUM>, and during the forward and backward movement process, the support leg pedestal <NUM> can drive the first flange <NUM> to move synchronously in the second rail <NUM>. The support block <NUM> is arranged in front of the pressing block <NUM>, the first rail <NUM> is located above the second rail <NUM>, and the support leg pedestal <NUM> can move forward and backward relative to the base <NUM> through the two layers of rails.

In the telescopic support leg structure of this embodiment, the reinforcing rod <NUM> is arranged between the base <NUM> and the support leg pedestal <NUM>, and the pressing block <NUM> and the support block <NUM> are arranged on the reinforcing rod <NUM>, so that the first rail <NUM> is formed between the support block <NUM> and the reinforcing rod <NUM>, and the second rail <NUM> is formed between the pressing block <NUM> and the base <NUM>. The first rail <NUM> and the second rail <NUM> arranged one above the other are slidably engaged with the connecting rod <NUM> and the first flange <NUM> on the support leg pedestal <NUM>, respectively. In this way, the support leg pedestal <NUM> can be telescoped forward and backward relative to the base <NUM>. Such a structure having two layers of rails enables a more stable and reliable telescoping process of the support leg pedestal <NUM>, and reduces the shaking gap between the support leg pedestal <NUM> and the base <NUM>, and involves a small number of parts, a reduced overall weight, and more easy and convenient installation operations.

Optionally, as shown in <FIG>, two reinforcing rods <NUM> are provided, and the two reinforcing rods <NUM> are symmetrically arranged on the left side and the right side of the support leg pedestal <NUM>, respectively.

The connecting rod <NUM> extends through the left side and the right side of the support leg pedestal <NUM>, and the left end and the right end of the connecting rod <NUM> respectively abut against the upper surfaces of the two reinforcing rods <NUM>, and the two ends of the connecting rod <NUM> are each engaged with the respective support block <NUM>. The left side and the right side of a lower end of the support leg pedestal <NUM> are each provided with a first flange <NUM>, and each first flange <NUM> is engaged with the respective pressing block <NUM>. In this embodiment, the number of reinforcing rods <NUM> is designed to be two, to make the telescopic movement of the support leg pedestal <NUM> more stable and reliable.

Optionally, as shown in <FIG> and <FIG>, the base <NUM> is provided with a third rail <NUM>, and a sliding column <NUM> configured to engage with the third rail <NUM> is arranged on the support leg pedestal <NUM>.

The length direction of the third rail <NUM> is consistent with the front-rear direction. The sliding column <NUM> is arranged at a rear end of the support leg pedestal <NUM>. A support leg <NUM> is hingedly connected to a front end of the support leg pedestal <NUM>. When the sliding column <NUM> moves to a rearmost end of the third rail <NUM>, the support leg <NUM> is in a retracted state (as shown in <FIG>). When the sliding column <NUM> moves to a frontmost end of the third rail <NUM>, the support leg <NUM> is in a pulled-out state (as shown in <FIG>).

In this embodiment, with the design of the sliding column <NUM> and the third rail <NUM> that are slidably connected to each other, the slidable connection between the support leg pedestal <NUM> and the base <NUM> in the front-rear direction is realized, and the support leg pedestal <NUM> will not tilt during the sliding process.

Optionally, as shown in <FIG>, <FIG>, and <FIG>, the sliding column <NUM> is connected to a fastener <NUM> configured to prevent the sliding column <NUM> from disengaging from the third rail <NUM>.

The fastener <NUM> is configured to limit the vertical movement of the sliding column <NUM> relative to the third rail <NUM>, i.e., prevent the support leg pedestal <NUM> from moving vertically relative to the base <NUM>. The fastener <NUM> is preferably a screw having a threaded rod and a screw cap. A diameter of the screw cap is greater than a width of the third rail <NUM> in the left-right direction. The screw cap is located below the third rail <NUM>. The threaded rod extending through the third rail <NUM> is fixedly connected to the sliding column <NUM>.

Optionally, as shown in <FIG>, the reinforcing rod <NUM> is made of a metal. The reinforcing rod <NUM> is a hollow structure to ensure that the overall structure has a light weight. The reinforcing rod <NUM> is made of a metal piece to ensure the deformation resistance of the reinforcing rod <NUM>.

Optionally, as shown in <FIG>, the support block <NUM> and the pressing block <NUM> are integrally formed with the reinforcing rod <NUM>. The support block <NUM> and the pressing block <NUM> may be fixedly connected to the reinforcing rod <NUM> by die casting or welding separately. In this embodiment, the support block <NUM>, the pressing block <NUM>, and the reinforcing rod <NUM> are designed to be integrally formed, and therefore can be assembled as one component, to facilitate the installation.

Optionally, as shown in <FIG>, <FIG>, and <FIG>, the support block <NUM> has a U-shaped slot <NUM> with an opening facing rearward, and when the support leg pedestal <NUM> is pulled forward to an outermost position, the connecting rod <NUM> is engaged into the U-shaped slot <NUM>.

When the support leg <NUM> is supported by a chassis of a vehicle, the connecting rod <NUM> supports an inner wall of the U-shaped slot <NUM> upwards, to prevent the support leg pedestal <NUM> from disengaging from the reinforcing rod <NUM> in the forward and backward movement process, and ensure the firm connection between the support leg pedestal <NUM> and the base <NUM> especially when the support leg pedestal <NUM> is located at the outermost position and is stressed.

Optionally, as shown in <FIG>, <FIG>, and <FIG>, the support leg pedestal <NUM> is provided with a second flange <NUM>, and when the support leg pedestal <NUM> is pulled forward to the outermost position, the second flange <NUM> abuts against an upper surface of the pressing block <NUM>.

The left side and the right side of the rear end of the support leg pedestal <NUM> are each provided with a second flange <NUM>. When the support leg <NUM> is pulled forward to the outermost position, the second flange <NUM> on each side abuts against the upper surface of the respective pressing block <NUM>. When the support leg <NUM> is supported by the chassis of the vehicle, the second flange <NUM> supports the pressing block <NUM> downward, and the connecting rod <NUM> supports the support block <NUM> upward, to form a strong supporting lever, so that the support leg <NUM> can be firmly supported by the chassis of the vehicle.

Optionally, as shown in <FIG> and <FIG>, a limiting bump <NUM> configured to engage with the second flange <NUM> is further arranged on the upper surface of the pressing block <NUM>.

The limiting bump <NUM> is arranged at a front end of the upper surface of the pressing block <NUM>, so that when the support leg pedestal <NUM> moves to the outermost position, the second flange <NUM> abuts against the limiting bump <NUM>. In this embodiment, the arrangement of the limiting bump <NUM> configured to engage with the second flange <NUM> ensures that the second flange <NUM> can be engaged with the pressing block to prevent the second flange <NUM> from disengaging from the pressing block <NUM> during the forward and backward movement of the support leg pedestal <NUM>.

Another embodiment of the present disclosure provides a child safety seat, including the telescopic support leg structure as described above.

Claim 1:
A telescopic support leg structure, comprising a base (<NUM>) and a support leg pedestal (<NUM>) slidably connected to the base (<NUM>), wherein a reinforcing rod (<NUM>) is mounted on the base (<NUM>), the support leg pedestal (<NUM>) is slidably connected to the reinforcing rod (<NUM>), and a pressing block (<NUM>) and a support block (<NUM>) are arranged at an end of the reinforcing rod (<NUM>) connected to the support leg pedestal (<NUM>); and the telescopic support leg structure further comprises a connecting rod (<NUM>) extending through the support leg pedestal (<NUM>), wherein the connecting rod (<NUM>) abuts against an upper surface of the reinforcing rod (<NUM>), a first rail (<NUM>) configured to engage with the connecting rod (<NUM>) is formed between the support block (<NUM>) and the upper surface of the reinforcing rod (<NUM>), the support leg pedestal (<NUM>) is provided with a first flange (<NUM>), and a second rail (<NUM>) configured to engage with the first flange (<NUM>) is formed between the pressing block (<NUM>) and the base (<NUM>).