Gas spring for a child seat

Abstract

This utility model discloses a gas spring for a child seat, belonging to the field of gas spring technology. It includes a riser tube, with a bushing fixed to the upper side inside the riser tube. A polygonal outer tube is fixed inside the bushing, and an inner tube is fixed inside the polygonal outer tube. A piston rod is installed inside the inner tube. A washer four is fixed to the lower end of the riser tube, and a clip is installed at the lower end of the washer four to fix the piston rod. A clip washer is installed between the clip and the washer four. This utility model, through the cooperation of components such as buttons and control valves, can precisely control the nitrogen gas passage, achieving delicate adjustment of seat height. Compared with some traditional gas springs, the height adjustment response is more sensitive, and the position locking is more stable, meeting the need for precise seat height adaptation. Furthermore, children are active and energetic; the hexagonal prism structure prevents the polygonal outer tube from rotating, fixing the seat angle and preventing children from accidentally rotating the seat, thus avoiding dangers such as tipping over or falling, and protecting their sitting posture safety.

Description

Technical Field

[0001] This utility model belongs to the field of gas spring technology, specifically relating to a gas spring for a child seat. Background Technology

[0002] Gas springs (also known as gas springs) for child car seats are core components used to adjust seat height or provide support. They mainly consist of a sealed pressure cylinder, piston rod, piston, and filling material (inert gas or oil-gas mixture).

[0003] Existing child seat gas springs have three obvious defects: First, they are structurally and safety-wise inadequate. The outer tubes are mostly round and easy to rotate, increasing the risk of children tipping over. The simple sealing components also lead to nitrogen leakage and unstable pressure, affecting support safety and lifespan. Second, they are poorly adjustable and provide a poor user experience. The control valve linkage is rough, making height adjustment inaccurate. The lack of a proper cushioning design makes it easy to feel impact when raising or lowering the seat or when subjected to force, which cannot meet the needs of children. Third, they are not durable or adaptable. The materials have poor fatigue resistance and corrosion resistance, and are prone to wear and rust. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a gas spring for child seats, which features high safety and better performance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gas spring for a child seat, comprising a riser tube, a bushing fixed to the upper side inside the riser tube, a polygonal outer tube fixed in the bushing, an inner tube fixed in the polygonal outer tube, a piston rod inside the inner tube, a washer four fixed to the lower end inside the riser tube, a clip at the lower end of the washer four for fixing the piston rod, a clip washer between the clip and the washer four, a rear support is provided at the lower end between the piston rod and the polygonal outer tube, an open support is provided on the upper side of the rear support, a spring ring is sleeved on the piston rod on the upper side of the open support, a piston is provided outside the spring ring, a washer three is provided between the piston and the piston rod, a washer two is sleeved on the outer side of the piston rod on the upper side of the piston, a control valve is installed on the upper side inside the polygonal outer tube, an inner support is provided at the lower end of the control valve, a washer one is installed between the inner support and the control valve, a switch pin is installed at the upper end of the inner support, a button is fixed at the upper end of the switch pin, and a front support is provided between the switch pin and the polygonal outer tube.

[0006] Preferably, O-ring one and O-ring two are respectively provided between the control valve and the polygonal outer tube and between the control valve and the inner tube, O-ring four is provided between the piston rod and the piston, O-ring five is provided at the upper end between the piston and the inner tube, O-ring three is provided between the inner support and the control valve, and an air seal is provided between the rear support and the open support.

[0007] Preferably, a buffer rubber is fixed to the lower side of the piston rod surface, and two bearing washers are provided on the lower side of the buffer rubber, with a ball bearing provided between the two bearing washers.

[0008] Preferably, the polygonal outer tube is configured as a hexagonal structure, and the polygonal outer tube, the riser tube, and the piston rod are all steel structures. The surface of the riser tube is electroplated, and the front bracket is fixed to the polygonal outer tube by riveting.

[0009] Preferably, the button is used to trigger the action of the switch pin, which in turn controls the valve to control the high-pressure nitrogen passage in the chamber, thereby achieving the lifting and lowering adjustment of the piston rod.

[0010] Compared with the prior art, the beneficial effects of this utility model are: This invention, through the use of buttons, control valves, and other components, can precisely control the nitrogen gas passage, enabling delicate adjustments to the seat height. Compared to some traditional gas springs, it offers more sensitive lifting response and more stable position locking, meeting the need for precise seat height adaptation. Furthermore, the hexagonal prism structure prevents the polygonal outer tube from rotating, fixing the seat angle and preventing accidents such as tipping over or falling while the seat is in motion, thus protecting the child's posture. Multiple O-rings and gas seals form a sealing system that effectively reduces nitrogen leakage, ensures stable chamber pressure, and extends performance life. The piston movement, combined with the sealing structure, creates damping, resulting in a smooth and shock-free lifting process. Buffer rubber and bearing washers further reduce shock and friction, significantly improving the smoothness and comfort of seat adjustments compared to the stiffness of traditional spring-based shock absorption. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a perspective view of the present utility model; Figure 3 This is a bottom-view perspective view of the present invention; In the diagram: 1. Button; 2. Front bracket; 3. Switch pin; 4. Inner bracket; 5. O-ring 1; 6. Control valve; 7. O-ring 2; 8. O-ring 3; 9. Washer 1; 10. Inner tube; 11. Polygonal outer tube; 12. Bushing; 13. Washer 2; 14. O-ring 4; 15. O-ring 5; 16. Washer 3; 17. Piston; 18. Spring ring; 19. Open bracket; 20. Air seal; 21. Rear bracket; 22. Piston rod; 23. Riser; 24. Buffer rubber; 25. Bearing washer; 26. Ball bearing; 27. Washer 4; 28. Clip washer; 29. ​​Clip. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] Please see Figure 1-3 This utility model provides the following technical solution: a gas spring for a child seat, including a riser tube 23, a bushing 12 fixed to the upper side inside the riser tube 23, a polygonal outer tube 11 fixed in the bushing 12, an inner tube 10 fixed in the polygonal outer tube 11, a piston rod 22 disposed inside the inner tube 10, a washer 27 fixed to the lower end inside the riser tube 23, a clip 29 disposed at the lower end of the washer 27 for fixing the piston rod 22, a clip washer 28 disposed between the clip 29 and the washer 27, a rear bracket 21 disposed at the lower end between the piston rod 22 and the polygonal outer tube 11, and a rear bracket 21 disposed on the upper side of the rear bracket 21. An open bracket 19 is provided, and a spring ring 18 is fitted on the piston rod 22 on the upper side of the open bracket 19. A piston 17 is provided on the outside of the spring ring 18. A washer 16 is provided between the piston 17 and the piston rod 22. A washer 13 is fitted on the outside of the piston rod 22 on the upper side of the piston 17. A control valve 6 is installed on the upper side inside the polygonal outer tube 11. An inner bracket 4 is provided at the lower end of the control valve 6. A washer 9 is installed between the inner bracket 4 and the control valve 6. A switch pin 3 is installed at the upper end of the inner bracket 4. A button 1 is fixed at the upper end of the switch pin 3. A front bracket 2 is provided between the switch pin 3 and the polygonal outer tube 11.

[0014] Specifically, O-ring 1 5 and O-ring 2 7 are respectively installed between control valve 6 and polygonal outer tube 11 and between control valve 6 and inner tube 10; O-ring 4 14 is installed between piston rod 22 and piston 17; O-ring 5 15 is installed at the upper end between piston 17 and inner tube 10; O-ring 3 8 is installed between inner support 4 and control valve 6; and air seal 20 is installed between rear support 21 and open support 19.

[0015] By adopting the above technical solution, and by setting multiple O-rings, gas seals 20 and other sealing components, nitrogen leakage is prevented and the pressure in the chamber is kept stable. When the piston 17 moves, the gas flows through the channel and the sealing structure to generate damping, making the lifting process smooth and avoiding sudden up and down impacts, thus improving the user experience, such as making the slow adjustment of the seat height smoother.

[0016] Specifically, a buffer rubber 24 is fixed on the lower side of the piston rod 22, and two bearing washers 25 are provided on the lower side of the buffer rubber 24. A ball bearing 26 is provided between the two bearing washers 25.

[0017] By adopting the above technical solutions, the buffer rubber 24, bearing washer 25, etc., assist in shock absorption and friction reduction during lifting and lowering, thus extending the life of the gas cylinder.

[0018] Specifically, the polygonal outer tube 11 is set as a hexagonal structure, and the polygonal outer tube 11, the riser 23 and the piston rod 22 are all steel structures. The surface of the riser 23 is electroplated, and the front bracket 2 and the polygonal outer tube 11 are fixed by riveting.

[0019] By adopting the above technical solution, children are active and playful. The hexagonal column structure prevents the polygonal outer tube 11 from rotating, thus fixing the seat angle and preventing children from falling or being overturned due to accidental rotation of the seat while sitting. This protects the child's sitting posture safety. The polygonal outer tube 11, the upright tube 23, and the piston rod 22 are all made of steel, making them more robust and durable. The surface of the upright tube 23 is electroplated to prevent rust.

[0020] Specifically, button 1 is used to trigger the action of switch pin 3, which in turn controls valve 6 to control the high-pressure nitrogen passage in the chamber, thereby achieving the lifting and lowering adjustment of piston rod 22.

[0021] By adopting the above technical solution, pressing button 1 with the seat lever drives switch pin 3, causing control valve 6 to operate, opening the nitrogen flow channel, and high-pressure nitrogen in the chamber pushes piston 17, causing piston rod 22 to extend.

[0022] The working principle and usage process of this utility model: When using the gas spring for a child seat, the device is installed in a suitable position. It consists of a polygonal outer tube 11, an inner tube 10, a piston rod 22, etc., forming a closed chamber. High-pressure nitrogen is injected into the chamber. Nitrogen is compressible and provides a power source for lifting and lowering. By pressing button 1 with the seat lever, the switch pin 3 is activated, causing the control valve 6 to operate and opening the nitrogen flow channel. The high-pressure nitrogen in the chamber pushes the piston 17, causing the piston rod 22 to extend, and the seat rises accordingly. When button 1 is released, the control valve 6 resets and closes the channel, locking the nitrogen pressure, and the seat remains in the raised position. When a person sits on the seat, pressing button 1 with the seat lever opens the control valve 6. The high-pressure nitrogen is squeezed by external force and flows back through the channel, causing the piston rod 22 to retract, and the seat lowers. When button 1 is released, the control valve 6 closes, and the nitrogen pressure is locked back in place.

[0023] By setting multiple O-rings, air seals 20 and other sealing components, nitrogen leakage is prevented and the pressure in the chamber is kept stable. When the piston 17 moves, the gas flows through the channel and the sealing structure to generate damping, making the lifting process smooth and avoiding sudden up and down impacts, thus improving the user experience, such as making the slow adjustment of the seat height smoother.

[0024] The positions of fixed components such as the front bracket 2, rear bracket 21, inner bracket 4, and open bracket 19 ensure the overall stability of the gas rod structure. Buffer rubber 24, bearing washers 25, etc., assist in shock absorption and friction reduction during lifting and lowering, extending the life of the gas rod.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas spring for a child seat, comprising a riser tube (23), characterized in that: A bushing (12) is fixed to the upper side inside the riser (23). A polygonal outer tube (11) is fixed inside the bushing (12). An inner tube (10) is fixed inside the polygonal outer tube (11). A piston rod (22) is installed inside the inner tube (10). A washer four (27) is fixed to the lower end inside the riser (23). A clamp (29) is installed at the lower end of the washer four (27) to fix the piston rod (22). A clamp washer (28) is installed between the clamp (29) and the washer four (27). A rear support (21) is installed at the lower end between the piston rod (22) and the polygonal outer tube (11). An open support (19) is installed on the upper side of the rear support (21). A spring ring (18) is fitted on the upper piston rod (22), a piston (17) is set on the outside of the spring ring (18), a washer three (16) is set between the piston (17) and the piston rod (22), a washer two (13) is fitted on the outside of the piston rod (22) on the upper side of the piston (17), a control valve (6) is installed on the upper side inside the polygonal outer tube (11), an inner bracket (4) is set at the lower end of the control valve (6), a washer one (9) is installed between the inner bracket (4) and the control valve (6), a switch pin (3) is installed at the upper end of the inner bracket (4), a button (1) is fixed at the upper end of the switch pin (3), and a front bracket (2) is set between the switch pin (3) and the polygonal outer tube (11).

2. The gas spring for a child car seat according to claim 1, characterized in that: O-ring 1 (5) and O-ring 2 (7) are respectively provided between the control valve (6) and the polygonal outer tube (11) and between the control valve (6) and the inner tube (10). O-ring 4 (14) is provided between the piston rod (22) and the piston (17). O-ring 5 (15) is provided at the upper end between the piston (17) and the inner tube (10). O-ring 3 (8) is provided between the inner support (4) and the control valve (6). An air seal (20) is provided between the rear support (21) and the open support (19).

3. The gas spring for a child car seat according to claim 1, characterized in that: A buffer rubber (24) is fixed on the lower side of the piston rod (22), and two bearing washers (25) are provided on the lower side of the buffer rubber (24), and a ball bearing (26) is provided between the two bearing washers (25).

4. A gas spring for a child car seat according to claim 1, characterized in that: The polygonal outer tube (11) is set as a hexagonal structure, and the polygonal outer tube (11), the riser (23) and the piston rod (22) are all steel structures. The surface of the riser (23) is electroplated, and the front bracket (2) is fixed to the polygonal outer tube (11) by riveting.

5. A gas spring for a child car seat according to claim 1, characterized in that: The button (1) is used to trigger the action of the switch pin (3), which in turn controls the control valve (6) to control the high-pressure nitrogen passage in the chamber and realize the lifting and lowering adjustment of the piston rod (22).

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