Retractable support leg structure and child safety seat

Abstract

A retractable support leg structure and a child safety seat. The structure comprises an outer tube (1) and an inner tube (2) slidingly connected to each other in a sleeving mode. A locking assembly (3) is disposed in the outer tube (1). The locking assembly (3) comprises a locking block (31), and a locking tongue (32) and a lock releasing button (33) that are movably connected to the locking block (31). The lock releasing button (33) is connected to the locking tongue (32). The inner tube (2) is provided with a plurality of positioning holes (21) suitable for engagement with the locking tongue (32). When the lock releasing button (33) moves relative to the locking block (31), the lock releasing button (33) drives the locking tongue (32) to translate, so as to achieve disengagement or engagement between the locking tongue (32) and the positioning hole (21). According to the retractable support leg structure, mutual locking or releasing between the inner tube (2) and the outer tube (1) is implemented by using the lock releasing button (33) to drive the locking tongue (32) to translate, so as to implement adjustment of the length of the support leg; and the locking tongue (32) switches an engagement state with the positioning hole (21) in a translation mode, and the width of the positioning hole (21) in an up-down direction can be made as small as possible, to enable a gap between the locking tongue (32) and the inner wall of the positioning hole (21) to be small. Therefore, the shaking between the inner tube (2) and the outer tube (1) is small, and the situation of misalignment is not prone to occurring.

Description

Retractable support leg structure and child safety seat Technical Field

[0001] The utility model relates to the technical field of automobile safety products, in particular to a telescopic support leg structure and a child safety seat. Background Art

[0002] The support legs of some child safety seats on the market are designed to have adjustable lengths, which is achieved by adjusting the relative positions of the inner and outer tubes of the support legs. However, in the prior art, the locking assembly between the inner and outer tubes unlocks or locks the inner and outer tubes with each other through rotational motion, wherein the opening of the positioning hole on the inner tube for cooperating with the locking assembly is relatively large, which makes it easy for the inner and outer tubes to shake. Utility Model Content

[0003] In order to solve at least one aspect of the above problems, the utility model first provides a retractable support leg structure, including an outer tube and an inner tube that are slidably connected to each other, a locking assembly is arranged in the outer tube, the locking assembly includes a locking block and a locking tongue and a release button movably connected to the locking block, the release button is connected to the locking tongue, and the inner tube is provided with a plurality of positioning holes suitable for cooperating with the locking tongue; when the release button moves relative to the locking block, the release button drives the locking tongue to translate, so as to achieve the disengagement or cooperation of the locking tongue with the positioning hole.

[0004] Optionally, the outer tube is a plastic part, and the inner tube is a metal part or a plastic part or a metal-plastic combination part.

[0005] Optionally, the release button is hingedly connected to the lock block, the release button is provided with a connecting block, the lock tongue is provided with a through hole movably connected to the connecting block, and the lock block is provided with a channel for the lock tongue to move forward and backward.

[0006] Optionally, a first restoring member is provided between the release button and the locking block, one end of the first restoring member is connected to an end of the release button away from the connecting block, and the other end of the first restoring member is connected to the locking block.

[0007] Optionally, flanges are provided on both the left and right sides of the locking tongue, and the channel is provided with guide holes that slide forward and backward with the flanges.

[0008] Optionally, the upper end of the inner tube is connected to a second limiting screw, and the locking block is provided with a step suitable for abutting against the second limiting screw.

[0009] Optionally, the lower end of the inner tube is connected to a foot pad.

[0010] Optionally, a second reset member is provided between the locking block and the outer tube, two ends of the second reset member are respectively connected to the outer tube and the locking block, the locking block is movably connected to the outer tube up and down, the locking block is provided with a first state identification and a second state identification arranged up and down, and the outer tube is provided with a display window; when the inner tube is not in a supporting state, the locking block moves downward under the action of the second reset member, and at this time the display window correspondingly presents the first state identification; when the inner tube is in a supporting state, the locking block moves upward by the supporting force, and at this time the display window correspondingly presents the second state identification.

[0011] Optionally, the outer tube is connected to a first limit screw for limiting the position of the locking block. When the inner tube is not in a supporting state, the locking block moves downward under the action of the second reset member and abuts against the first limit screw; when the inner tube is in a supporting state, the locking block moves upward under the supporting force and separates from the first limit screw.

[0012] Compared with the prior art, the retractable support leg structure in the present invention realizes the mutual locking or unlocking of the inner tube and the outer tube by driving the lock tongue to move horizontally by the release button, thereby realizing the adjustment of the length of the support leg. The lock tongue switches the matching state with the positioning hole in a translational manner. The width of the positioning hole in the up and down directions can be made as small as possible, so that the gap between the lock tongue and the inner wall of the positioning hole is smaller, so that the shaking between the inner tube and the outer tube is smaller, and slippage is less likely to occur.

[0013] In addition, the present invention provides a child safety seat comprising the telescopic support leg structure as described above.

[0014] Compared with the prior art, the child safety seat of the present invention and the above-mentioned retractable support leg structure have the same advantages over the prior art, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a partial exploded view of a retractable support leg structure according to an embodiment of the present invention;

[0016] FIG2 is a structural diagram of a retractable support leg structure according to an embodiment of the present invention;

[0017] FIG3 is a partial cross-sectional view of the retractable support leg structure of the embodiment of the present invention when it is not in the supporting state;

[0018] FIG4 is a partial cross-sectional view of the retractable support leg structure of an embodiment of the present invention when unlocked;

[0019] FIG5 is a partial cross-sectional view of the telescopic support leg structure of the embodiment of the present invention in a supporting state;

[0020] FIG6 is a second partial cross-sectional view of the retractable support leg structure of the embodiment of the present invention in a supporting state;

[0021] FIG7 is a cross-sectional view of the retractable support leg structure of the embodiment of the present invention when it is not in the supporting state;

[0022] FIG8 is an enlarged view of portion A in FIG7 ;

[0023] FIG9 is a cross-sectional view of the inner tube of the embodiment of the present invention when being pulled to the lowest position.

[0024] Description of reference numerals:

[0025] 1. Outer tube; 11. Display window; 2. Inner tube; 21. Positioning hole; 3. Locking assembly; 31. Locking block; 311. Channel; 3111. Guide hole; 312. Step; 313. First state indicator; 314. Second state indicator; 32. Lock tongue; 321. Through hole; 322. Flanged edge; 33. Release button; 331. Connecting block; 34. First reset member; 4. Second limit screw; 5. Foot pad; 6. Second reset member; 7. First limit screw. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0027] In the description of the present invention, it should be understood that the terms "upper" and "lower" and the like indicate positions or location relationships based on the positions or location relationships during normal use of the product.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. The drawings of the embodiments of the present invention are provided with a coordinate system XYZ, wherein the positive direction of the X-axis represents the left, the negative direction of the X-axis represents the right, the positive direction of the Y-axis represents the front, the negative direction of the Y-axis represents the back, the positive direction of the Z-axis represents the top, and the negative direction of the Z-axis represents the bottom.

[0029] An embodiment of the present utility model provides a retractable supporting leg structure, as shown in Figures 1 to 8, comprising an outer tube 1 and an inner tube 2 slidably sleeved together, a locking assembly 3 is provided in the outer tube 1, the locking assembly 3 comprises a locking block 31 and a locking tongue 32 movably connected to the locking block 31, and a release button 33, the release button 33 is connected to the locking tongue 32, the inner tube 2 is provided with a plurality of positioning holes 21 suitable for cooperating with the locking tongue 32; when the release button 33 moves relative to the locking block 31, the release button 33 drives the locking tongue 32 to translate, so as to achieve the disengagement or engagement of the locking tongue 32 with the positioning hole 21.

[0030] When the locking cam 32 is in the locked state, the locking cam 32 is in the locked state, and the locking cam 32 is in the locked state.

[0031] The retractable support leg structure in this embodiment realizes the mutual locking or unlocking of the inner tube 2 and the outer tube 1 by driving the locking tongue 32 to move horizontally by the unlocking button 33, thereby realizing the adjustment of the length of the support leg. The locking tongue 32 switches the matching state with the positioning hole 21 in a translational manner. The width of the positioning hole 21 in the vertical direction can be made as small as possible, so that the gap between the locking tongue 32 and the inner wall of the positioning hole 21 is smaller, so that the shaking between the inner tube 2 and the outer tube 1 is smaller, and slippage is less likely to occur.

[0032] Optionally, the outer tube 1 is a plastic part, and the inner tube 2 is a metal part. This ensures the required strength of the support leg while reducing product weight and cost. The outer tube 1 is made of plastic and is an integral injection-molded design, significantly reducing manual assembly and parts costs. Furthermore, the friction noise between the plastic outer tube 1 and the metal inner tube 2 is reduced during use, eliminating the need for a plastic gasket used to reduce friction noise, further improving production efficiency. Furthermore, the inner tube 2 can also be a plastic part, or a metal-plastic combination, i.e., the inner tube 2 includes both metal and metal materials.

[0033] Optionally, in combination with Figures 1 to 8, the release button 33 is hingedly connected to the lock block 31, the release button 33 is provided with a connecting block 331, the lock tongue 32 is provided with a through hole 321 movably connected to the connecting block 331, and the lock block 31 is provided with a channel 311 for the lock tongue 32 to move forward and backward.

[0034] Among them, the release button 33 and the lock block 31 are hingedly connected through a rotating shaft; the length direction of the channel 311 is consistent with the front-to-back direction; the length direction of the through hole 321 is consistent with the up-down direction, and the width of the through hole 321 in the front-to-back direction is greater than the width of the connecting block 331 in the front-to-back direction, so that when the release button 33 rotates relative to the lock block 31, the connecting block 331 can move in and out of the through hole 321 at an angle, thereby driving the lock tongue 32 to move back and forth in the channel 311, and the structure is simple and reliable.

[0035] Optionally, as shown in Figures 1, 3, 4, and 5, a first reset member 34 is provided between the release button 33 and the lock block 31. One end of the first reset member 34 is connected to the end of the release button 33 away from the connection block 331, and the other end of the first reset member 34 is connected to the lock block 31. The first reset member 34 is preferably a compression spring. When the release button 33 is pressed to drive the lock tongue 32 to translate so that the lock tongue 32 and the positioning hole 21 are separated from each other, the first reset member 34 is in a compressed state. When the release button 33 is released, the lock tongue 32 automatically translates and resets under the action of the spring force of the first reset member 34 so that the lock tongue 32 and the positioning hole 21 are engaged with each other, which is convenient for operation.

[0036] Optionally, in combination with Figures 1, 6, 7 and 8, the left and right sides of the locking tongue 32 are provided with flanges 322, and the channel 311 is provided with guide holes 3111 that slide forward and backward with the flanges 322; the flanges 322 extend downward from the left and right sides of the locking tongue 32 to prevent the locking tongue 32 from moving left and right in the channel 311, so as to ensure that the locking tongue 32 can move stably back and forth in the channel 311, thereby ensuring the stability and reliability of the locking or unlocking operation of the inner tube 2 and the outer tube 1.

[0037] Optionally, in combination with Figures 1 to 8, a second reset member 6 is provided between the locking block 31 and the outer tube 1, and the two ends of the second reset member 6 are respectively connected to the outer tube 1 and the locking block 31, the locking block 31 is movably connected to the outer tube 1 up and down, the locking block 31 is provided with a first state mark 313 and a second state mark 314 arranged up and down, and the outer tube 1 is provided with a display window 11; when the inner tube 2 is not in the supporting state, the locking block 31 moves downward under the action of the second reset member 6, and at this time, the display window 11 correspondingly presents the first state mark 313; when the inner tube 2 is in the supporting state, the locking block 31 moves upward by the supporting force, and at this time, the display window 11 correspondingly presents the second state mark 314.

[0038] Among them, the second reset member 6 is preferably a compression spring, and the number of the second reset members 6 is two, and the two second reset members 6 are respectively arranged on the left and right sides of the locking block 31; the first state mark 313 is red, indicating that the support leg is in the supporting state, and the second state mark 314 is green, indicating that the support leg is in the supporting state, so that the user can quickly and accurately check the actual state of the support leg.

[0039] Optionally, in combination with Figures 6, 7 and 8, the outer tube 1 is connected to a first limiting screw 7 for limiting 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 action 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 due to the supporting force and separates from the first limiting screw 7; there are two first limiting screws 7, and the provision of the first limiting screw 7 can prevent the locking block 31 from detaching from the outer tube 1, thereby ensuring the stability of the structure, and the design of the first limiting screw 7 and the locking block 31 being movable up and down can realize that the display window 11 presents different status identifications under different states of the supporting legs.

[0040] Optionally, as shown in Figure 9, the upper end of the inner tube 2 is connected to a second limit screw 4, and the locking block 31 is provided with a step 312 suitable for abutting against the second limit screw 4; when the inner tube 2 is pulled to the lowest position relative to the outer tube 1, the second limit screw 4 abuts against the step 312 of the locking block 31 to prevent the inner tube 2 from falling off the outer tube 1.

[0041] Optionally, as shown in Figures 3 and 7, the lower end of the inner tube 2 is connected to a foot pad 5; the foot pad 5 is preferably a plastic part, which can prevent the metal inner tube 2 from injuring the user or the car, and increases the force area between the support leg and the car, reducing the pressure.

[0042] Another embodiment of the present invention provides a child safety seat, comprising the telescopic support leg structure as described above.

[0043] In the child safety seat of this embodiment, the inner tube 2 and the outer tube 1 are locked or released by the translation of the lock tongue 32 by the release button 33, thereby adjusting the length of the support leg. The lock tongue 32 switches the matching state with the positioning hole 21 by translation. The width of the positioning hole 21 in the vertical direction can be made as small as possible, so that the gap between the lock tongue 32 and the inner wall of the positioning hole 21 is small, so that the shaking between the inner tube 2 and the outer tube 1 is smaller, and the gear is less likely to slip.

[0044] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of the present utility model.

Claims

1. A retractable support leg structure, characterized in that: The invention comprises an outer tube (1) and an inner tube (2) which are slidably sleeved and connected to each other. A locking assembly (3) is arranged inside the outer tube (1). The locking assembly (3) comprises a locking block (31), a locking tongue (32) movably connected to the locking block (31), and a release button (33). The release button (33) is connected to the locking tongue (32). The inner tube (2) is provided with a plurality of positioning holes (21) suitable for cooperating with the locking tongue (32). When the release button (33) moves relative to the locking block (31), the release button (33) drives the locking tongue (32) to translate, so as to achieve the separation or cooperation of the locking tongue (32) with the positioning hole (21).

2. The retractable 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 combination part.

3. The retractable support leg structure according to claim 1, characterized in that: The release button (33) is hingedly connected to the lock block (31); the release button (33) is provided with a connecting block (331); the lock tongue (32) is provided with a through hole (321) movably connected to the connecting block (331); and the lock block (31) is provided with a channel (311) for the lock tongue (32) to move forward and backward.

4. The retractable support leg structure according to claim 3, characterized in that: A first restoring member (34) is provided between the release button (33) and the locking block (31); one end of the first restoring member (34) is connected to an end of the release button (33) away from the connecting block (331); and the other end of the first restoring member (34) is connected to the locking block (31).

5. The retractable support leg structure according to claim 3, characterized in that: The locking tongue (32) is provided with flanges (322) on both left and right sides, and the channel (311) is provided with a guide hole (3111) that is slidably matched with the flanges (322) in the front and rear directions.

6. The retractable 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 retractable 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 retractable support leg structure according to any one of claims 1 to 7, characterized in that: A second reset member (6) is provided between the locking block (31) and the outer tube (1), and two ends of the second reset member (6) are respectively connected to the outer tube (1) and the locking block (31), and the locking block (31) is movably connected to the outer tube (1) up and down, and the locking block (31) is provided with a first state mark (313) and a second state mark (314) arranged in an up-and-down manner, and 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 action of the second reset member (6), and at this time, the display window (11) correspondingly presents the first state mark (313); when the inner tube (2) is in a supporting state, the locking block (31) moves upward under the support force, and at this time, the display window (11) correspondingly presents the second state mark (314).

9. The retractable support leg structure according to claim 8, characterized in that: The outer tube (1) is connected to a first limiting screw (7) for limiting 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 action of the second reset 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 support force and separates from the first limiting screw (7).

10. A child safety seat, characterized in that: It comprises a retractable supporting leg structure as described in any one of claims 1 to 9.

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