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EP-4737207-A1 - RETRACTABLE SUPPORT LEG STRUCTURE AND CHILD SAFETY SEAT

EP4737207A1EP 4737207 A1EP4737207 A1EP 4737207A1EP-4737207-A1

Abstract

This disclosure provides a telescopic support leg structure and a child safety seat, including an outer tube and an inner tube that are slidably connected to each other. The outer tube is equipped with a locking assembly, which includes a locking block and a locking latch and an unlocking button that are movably connected to the locking block. The unlocking button is connected to the locking latch, and the inner tube has multiple positioning holes suitable for engaging with the locking latch. When the unlocking button moves relative to the locking block, it drives the locking latch to translate, thereby disengaging or engaging the locking latch with the positioning holes. This disclosure achieves the mutual locking or unlocking of the inner tube and outer tube by driving the locking latch to translate through the unlocking button, thus enabling the adjustment of the support leg length. The locking latch uses a translational method to switch its engagement state with the positioning holes, allowing the width of the positioning holes in the vertical direction to be made as small as possible. This results in a smaller gap between the locking latch and the inner wall of the positioning holes, therefore reducing the wobbling between the inner tube and outer tube and making it less likely to slip out of position.

Inventors

  • LIU, jianchun
  • JI, Xuewei

Assignees

  • Max-Inf (Ningbo) Baby Product Co., Ltd

Dates

Publication Date
20260506
Application Date
20240621

Claims (10)

  1. A telescopic support leg structure, characterized in that it comprises an outer tube (1) and an inner tube (2) slidably connected to each other, wherein a locking assembly (3) is provided inside the outer tube (1), the locking assembly (3) includes a locking block (31) and a locking latch (32) and an unlocking button (33) movably connected to the locking block (31), the unlocking button (33) is connected to the locking latch (32), the inner tube (2) is provided with multiple positioning holes (21) suitable for cooperating with the locking latch (32); when the unlocking button (33) moves relative to the locking block (31), the unlocking button (33) drives the locking latch (32) to translate, so as to disengage or engage the locking latch (32) with the positioning hole (21).
  2. The telescopic support leg structure according to claim 1, characterized in that the outer tube (1) is a plastic part, and the inner tube (2) is a metal part or a plastic part or a metal-plastic composite part.
  3. The telescopic support leg structure according to claim 1, characterized in that the unlocking button (33) is pivotally connected to the locking block (31), the unlocking button (33) is provided with a connecting block (331), the locking latch (32) is provided with a through hole (321) movably connected to the connecting block (331), and the locking block (31) is provided with a channel (311) for the locking latch (32) to move back and forth.
  4. The telescopic support leg structure according to claim 3, characterized in that a first resetting member (34) is provided between the unlocking button (33) and the locking block (31), one end of the first resetting member (34) is connected to the end of the unlocking button (33) away from the connecting block (331), and the other end of the first resetting member (34) is connected to the locking block (31).
  5. The telescopic support leg structure according to claim 3, characterized in that the left and right sides of the locking latch (32) are both provided with flanged edges (322), and the channel (311) is provided with guiding holes (3111) that slidably cooperate with the flanged edges (322) in the front-back direction.
  6. The telescopic support leg structure according to claim 1, characterized in that the upper end of the inner tube (2) is connected to a second limiting screw (4), and the locking block (31) is provided with a step (312) suitable for abutting against the second limiting screw (4).
  7. The telescopic support leg structure according to claim 1, characterized in that the lower end of the inner tube (2) is connected to a foot pad (5).
  8. The telescopic support leg structure according to any one of claims 1-7, characterized in that a second resetting member (6) is provided between the locking block (31) and the outer tube (1), the two ends of the second resetting member (6) are connected to the outer tube (1) and the locking block (31) respectively, the locking block (31) is movably connected to the outer tube (1) in the up-down direction, the locking block (31) is provided with vertically arranged first state indicator (313) and second state indicator (314), the outer tube (1) is provided with a display window (11); when the inner tube (2) is not in a supporting state, the locking block (31) moves downward under the force of the second resetting member (6), at this time the display window (11) correspondingly shows the first state indicator (313); when the inner tube (2) is in a supporting state, the locking block (31) moves upward under the supporting force, at this time the display window (11) correspondingly shows the second state indicator (314).
  9. The telescopic support leg structure according to claim 8, characterized in that the outer tube (1) is connected to a first limiting screw (7) used to define the position of the locking block (31), when the inner tube (2) is not in a supporting state, the locking block (31) moves downward under the force of the second resetting member (6) and abuts against the first limiting screw (7); when the inner tube (2) is in a supporting state, the locking block (31) moves upward under the supporting force and separates from the first limiting screw (7).
  10. A child safety seat, characterized in that it includes the telescopic support leg structure according to any one of claims 1-9.

Description

Technical Field This disclosure relates to the field of automotive safety products technology, specifically to a telescopic support leg structure and child safety seat. Background of the Invention Some child safety seats on the market are designed with support legs that have adjustable lengths, which is achieved by adjusting the relative position of the inner tube and outer tube of the support leg. However, in existing technology, the locking assembly between the inner tube and outer tube achieves unlocking or locking through rotational movement. The opening of the positioning holes on the inner tube that cooperate with the locking assembly is relatively large, which leads to easy wobbling between the inner tube and outer tube. Summary of the Invention To solve at least one aspect of the above problems, this disclosure first provides a telescopic support leg structure, including an outer tube and an inner tube that are slidably connected. The outer tube is equipped with a locking assembly, which includes a locking block and a locking latch and unlocking button that are movably connected to the locking block. The unlocking button is connected to the locking latch, and the inner tube has multiple positioning holes suitable for cooperating with the locking latch. When the unlocking button moves relative to the locking block, it drives the locking latch to translate, thus achieving disengagement or engagement between the locking latch and the positioning holes. Optionally, the outer tube is a plastic component, and the inner tube is a metal component or plastic component or a metal-plastic composite component. Optionally, the unlocking button is movably connected to the locking block. The unlocking button has a connecting block, and the locking latch has a through hole that is movably connected to the connecting block. The locking block has a channel that allows the locking latch to move back and forth. Optionally, a first resetting member is provided between the unlocking button and the locking block. One end of the first resetting member is connected to the end of the unlocking button away from the connecting block, and the other end of the first resetting member is connected to the locking block. Optionally, flanged edges are provided on both the left and right sides of the locking latch, and the channel has guiding holes that cooperate with the flanged edges for front and back sliding. Optionally, a second limiting screw is connected to the upper end of the inner tube, and the locking block has a step suitable for abutting against the second limiting screw. Optionally, a foot pad is connected to the lower end of the inner tube. Optionally, a second resetting member is provided between the locking block and the outer tube. The two ends of the second resetting member are connected to the outer tube and the locking block respectively. The locking block is vertically movably connected to the outer tube. The locking block has vertically arranged first state indicator and second state indicator, and the outer tube has a display window. When the inner tube is not in a supporting state, the locking block moves downward under the force of the second resetting member, and at this time, the display window correspondingly shows the first state indicator. When the inner tube is in a supporting state, the locking block moves upward under the supporting force, and at this time, the display window correspondingly shows the second state indicator. Optionally, the outer tube is connected with a first limiting screw used to define the position of the locking block. When the inner tube is not in a supporting state, the locking block moves downward under the force of the second resetting member and abuts against the first limiting screw. When the inner tube is in a supporting state, the locking block moves upward under the supporting force and separates from the first limiting screw. Compared to the existing technology, the telescopic support leg structure in this disclosure achieves locking or unlocking between the inner tube and outer tube by the unlocking button driving the locking latch to translate, thereby adjusting the length of the support leg. The locking latch uses translation to switch its engagement state with the positioning holes, allowing the vertical width of the positioning holes to be made as small as possible. This results in a smaller gap between the locking latch and the inner wall of the positioning holes, thus reducing wobbling between the inner tube and outer tube and making slippage less likely to occur. Additionally, this disclosure provides a child safety seat that includes the aforementioned telescopic support leg structure. Compared to the prior art, the child safety seat of this disclosure has the same advantages as the aforementioned telescopic support leg structure compared to the existing technology, which will not be repeated here. Brief Description of the Drawings Figure 1 is a partial explode