Child safety seat backrest supporting leg mechanism

Abstract

The utility model provides a backrest supporting leg mechanism of a child safety seat. The child safety seat backrest supporting leg mechanism comprises an outer pipe, an inner pipe is arranged in the outer pipe, the outer pipe moves along the inner pipe, an adjusting seat assembly is fixed to the lower end of the outer pipe and comprises a clamping jaw and a button, the clamping jaw and the button are fixedly connected and arranged on the outer side of the outer pipe, and the clamping jaw is used for fixing the outer pipe and the inner pipe. The structure is simple and compact, and operation is easy.

Description

Technical Field

[0001] The utility model relates to a backrest supporting leg mechanism for a child safety seat. Background Art

[0002] Child safety seats are used to protect children's safety when riding in a car. In order to make the child safety seat more firmly fixed and safer, some existing child safety seats are provided with a support leg supported on the bottom plate of the car. In order to adapt to different seat heights of different models, the support leg needs to be retractable. The support leg retractable structure of the existing child safety seat generally adopts a traditional spring pin structure, that is, the user needs to use two fingers to press the spring pins on both sides of the support leg into the pin holes of the outer tube of the support leg, then pull the inner tube out or retract the outer tube, and then release the spring pin to re-lock the inner and outer tubes. This retractable structure is very difficult and unsafe to operate because the spring pin is small and smooth. Utility Model Content

[0003] In view of the defects of the existing child safety seat back support leg mechanism, the technical problem to be solved by the utility model is to provide a child safety seat back support leg mechanism which is easy to operate and safe.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, the utility model is realized through the following technical measures: a child safety seat backrest support leg mechanism, comprising: an outer tube, an inner tube is arranged inside the outer tube, the outer tube moves along the inner tube, an adjustment seat assembly is fixed to the lower end of the outer tube, the adjustment seat assembly comprises a claw and a button, the claw is fixedly connected to the button and is arranged on the outside of the outer tube, and the claw is used to fix the outer tube and the inner tube.

[0005] Furthermore, the outer tube has a positioning hole at the lower end, preferably two positioning holes, and the inner tube has a plurality of adjustment holes on one side. The adjustment holes of the inner tube are opposite to the positioning holes of the outer tube, and the spacing between the adjustment holes of the inner tube is the same as that of the positioning holes of the outer tube.

[0006] Furthermore, the button and claw of the adjustment seat assembly are U-shaped, and one side of the claw extends inward to form a limiting plate, and the position and number of the limiting plates correspond to the positioning holes of the outer tube. The limiting plate passes through the positioning holes of the outer tube and is clamped on the adjustment holes of the inner tube. Buckle grooves are provided on both sides of the button, and hooks are provided on both sides of the claw. The button and the claw are fixed to the outside of the outer tube by buckling the buckle grooves and the hooks.

[0007] Furthermore, a return spring is provided in the button, one side of the return spring is fixed to the button, and the other side of the return spring is against the outer tube.

[0008] Furthermore, the adjustment seat assembly also includes a shell, which is composed of an outer shell I and an outer shell II. The upper and lower ends of the shell are provided with through holes for the outer tube to pass through. The outer shells I and II are provided with upper and lower staggered reinforcing ribs for supporting the outer tube. One end of the shell is provided with a guide groove, and the button is embedded in the guide groove of the shell.

[0009] Compared with the prior art, the advantages of the utility model are: simple and compact structure, simple operation, and cost savings to a certain extent. The upper and lower limit cards limit the extension and retraction of the inner tube, making the locking safer and more reliable, and the embedded button design can avoid the extension and retraction of the inner tube caused by misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0011] Figure 1 The utility model is a schematic diagram of the structure of a child safety seat backrest support leg mechanism.

[0012] Figure 2 The utility model is a schematic diagram of an explosion of a backrest support leg mechanism of a child safety seat.

[0013] Explanation of the accompanying drawings: 1. Shell; 2. Shell I; 3. Outer tube; 4. Inner tube; 5. Button; 6. Claw; 7. Return spring; 8. Buckle groove; 9. Positioning hole; 10. Hook; 11. Limiting plate; 12. Adjustment hole; 13. Shell II; 14. Reinforcing rib; 15. Guide groove. DETAILED DESCRIPTION

[0014] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0015] In the description of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "bottom", "top", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0016] Please refer to Figure 1 , Figure 2The child safety seat backrest support leg mechanism provided in this embodiment includes: an outer tube 3, an inner tube 4 is arranged inside the outer tube 3, the outer tube 3 moves along the inner tube 4, an adjustment seat assembly is fixed to the lower end of the outer tube 3, the adjustment seat assembly includes a claw 6 and a button 5, the claw 6 is fixedly connected to the button 5 and is arranged on the outside of the outer tube 3, and the claw 6 is used to fix the outer tube 3 and the inner tube 4.

[0017] The outer tube 3 has a positioning hole 9 at the lower end, and there are preferably two positioning holes 9. The inner tube 4 has a plurality of adjustment holes 12 on one side. The adjustment holes 12 of the inner tube 4 are positioned opposite to the positioning holes 9 of the outer tube 3 , and the spacing between the adjustment holes 12 of the inner tube 4 is the same as that of the positioning holes 9 of the outer tube 3 .

[0018] The button 5 and the claw 6 of the adjustment seat assembly are both U-shaped, and one side of the claw 6 extends inward to form a limiting piece 11. The position and number of the limiting piece 11 correspond to the positioning hole 9 of the outer tube 3. The limiting piece 11 passes through the positioning hole 9 of the outer tube 3 and is clamped on the adjustment hole 12 of the inner tube 4. Buckle grooves 8 are provided on both sides of the button 5, and hooks 10 are provided on both sides of the claw 6. The button 5 and the claw 6 are fixed to the outside of the outer tube 3 by buckling the buckle grooves 8 and the hooks 10.

[0019] A return spring 7 is disposed inside the button 5 . One side of the return spring 7 is fixed to the button 5 , and the other side of the return spring 7 abuts against the outer tube 3 .

[0020] The adjustment seat assembly also includes a shell 1, which is composed of an outer shell Ⅰ2 and an outer shell Ⅱ13. The upper and lower ends of the shell 1 are provided with through holes for the outer tube 3 to penetrate. The outer shell Ⅰ2 and the outer shell Ⅱ13 are provided with upper and lower staggered reinforcing ribs 14 inside for supporting the outer tube 3. One end of the shell 1 is provided with a guide groove 15, and the button 5 is embedded in the guide groove 15 of the shell 1.

[0021] When the backrest support leg mechanism of a child safety seat of the utility model is in use, the button 5 is pressed to push the claw 6, and the limiting piece 11 of the claw 6 withdraws from the adjustment hole 12 of the inner tube 4, and the inner tube 4 can slide up and down to adjust the telescopic length. After the button 5 is released, the limiting piece 11 of the claw 6 is reinserted into the adjustment hole 12 of the inner tube 4 under the action of the return spring 7, thereby locking the inner tube 4.

[0022] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A child safety seat backrest support leg mechanism, comprising: An outer tube, an inner tube is arranged inside the outer tube, and the outer tube moves along the inner tube. It is characterized in that an adjustment seat assembly is fixed to the lower end of the outer tube, and the adjustment seat assembly includes a claw and a button. The claw is fixedly connected to the button and is arranged on the outside of the outer tube, and the claw is used to fix the outer tube and the inner tube.

2. A child safety seat backrest support leg mechanism according to claim 1, characterized in that: A positioning hole is provided at the lower end of the outer tube, and a plurality of adjustment holes are provided on one side of the inner tube. The adjustment holes of the inner tube are located opposite to the positioning holes of the outer tube, and the spacing between the adjustment holes of the inner tube is the same as that of the positioning holes of the outer tube.

3. A child safety seat backrest support leg mechanism according to claim 2, characterized in that: The button and claw of the adjustment seat assembly are both U-shaped, and one side of the claw extends inward to form a limiting plate. The position and number of the limiting plates correspond to the positioning holes of the outer tube. The limiting plate passes through the positioning holes of the outer tube and is clamped on the adjustment holes of the inner tube. Buckle grooves are provided on both sides of the button, and hooks are provided on both sides of the claw. The button and the claw are fixed to the outside of the outer tube by buckling the buckle grooves and the hooks.

4. The child safety seat backrest support leg mechanism according to claim 1, characterized in that: A return spring is arranged in the button, one side of the return spring is fixed to the button, and the other side of the return spring is against the outer tube.

5. The child safety seat backrest support leg mechanism according to claim 4, characterized in that: The adjustment seat assembly also includes a shell, which is composed of an outer shell I and an outer shell II. The upper and lower ends of the shell are provided with through holes for the outer tube to pass through. The inner parts of the outer shells I and II are provided with vertically staggered reinforcing ribs for supporting the outer tube. A guide groove is provided at one end of the shell, and the button is embedded in the guide groove of the shell.

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