Pluggable pneumatic connection structure for vehicle seat headrest

Abstract

A pluggable pneumatic connection structure (11) for a vehicle seat headrest, comprising: a first connecting sleeve (4) disposed in a guide sleeve (96), a first connecting member (6) disposed in the first connecting sleeve, and a second connecting member (5) capable of being pluggably connected to the first connecting member. The end of the second connecting member distant from the first connecting member is connected to a headrest rod (1); the bottom of the first connecting member is provided with first connecting portions (63) comprising first gas passages (631), the top of the second connecting member is provided with second connecting portions (51) comprising second gas passages (511), and the second connecting member is internally provided with a flow channel communicated with the first gas passages and the second gas passages; and the first connecting portions are connected to a first gas tube (21), and the second connecting portions are connected to a second gas tube (22). During use, gas is supplied to a gas-consuming component by means of the first gas passages, the flow channel, and the second gas passages; and during disassembly, the headrest rod is detached together with the second gas tube and the second connecting member from the first connecting member, thereby achieving disassembly of the headrest.

Description

A pluggable gas connection structure for car seat headrests

[0001] Cross-references to related applications

[0002] This disclosure claims priority to Chinese Patent Application No. 2024232127039, filed on December 25, 2024, entitled “A Pluggable Gas Connection Structure for an Automobile Seat Headrest,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of automotive technology, specifically to a pluggable gas connection structure for an automotive seat headrest. Background Technology

[0004] As vehicles become more common, the demand for ride comfort is gradually increasing, leading to the development of car headrests with pneumatic systems. These headrests contain air bags that inflate and deflate to change the shape of the headrest, providing massage and support or adjusting its position.

[0005] In the existing air supply system that supplies air to and deflates the headrest airbags, the air tube runs through the headrest rod of the car backrest and into the airbag to supply air to the airbag. When the headrest rod is removed, the air tube is still connected to the airbag inside the headrest, so simply unplugging the headrest rod is not enough to remove the headrest. The air tube must be disconnected from the air source at the same time to completely remove the headrest. Summary of the Invention

[0006] In view of the above-mentioned defects or deficiencies in the prior art, this disclosure aims to provide a pluggable gas connection structure for an automotive seat headrest. The automotive seat includes a headrest body, and at least one headrest rod is provided at the bottom of the headrest body. The headrest rod is configured to connect with a guide sleeve inside the automotive seat. The pluggable gas connection structure is configured such that the headrest rod is connected to the guide sleeve, and includes:

[0007] A first connecting sleeve is fitted inside the seat guide sleeve, and has a first space inside, and includes a first opening and a second opening along a first direction;

[0008] A first connector is disposed within the first space, and at least one first connecting portion is provided at one end of the first connector near the second opening. The first connecting portion has a first airway and is configured to connect to a first air tube.

[0009] The second connector is disposed within the first space and is inserted into the first connector. A flow space is formed between the second connector and the first connector at the end near the first connecting part. The first air passage communicates with the flow space, and the second connector has a flow channel communicating with the flow space. The second connector has at least one second connecting part at the end near the first opening. The second connecting part has a second air passage communicating with the flow channel. The second connecting part is configured to connect with the second air tube. The end of the second connector away from the first connector and the second connecting part are fixedly disposed within the headrest rod.

[0010] According to the technical solution provided in the embodiments of this disclosure, a positioning guide sleeve is provided at the first opening, and the positioning guide sleeve is configured to guide the headrest rod to insert the second connector into the first connector.

[0011] According to the technical solution provided in the embodiments of this disclosure, the outer wall of the positioning guide sleeve is provided with a force-relieving groove, which is configured to release the squeezing force when the headrest rod and the positioning guide sleeve are inserted.

[0012] According to the technical solution provided in the embodiments of this disclosure, the flow channel includes branch airways that are connected to the second airway, and each of the branch airways passes through the second connector.

[0013] According to the technical solution provided in the embodiments of this disclosure, the number of the first air passage and the second air passage are the same, and they are arranged correspondingly. A sealing gasket is provided in the circulation space, and a first through hole is provided through the first air passage and the second air passage corresponding to the first air passage and the second air passage respectively. The two ends of the first through hole are respectively connected to the first air passage and the second air passage. The two ends of the sealing gasket along the first direction abut against the second connector and the first connector respectively.

[0014] According to the technical solution provided in the embodiments of this disclosure, the inner wall of the first connector is provided with a first guide portion, and the outer walls of the second connector and the sealing gasket are respectively provided with a second guide portion. The first guide portion and the second guide portion are configured such that the first through hole corresponds to the first air passage and the second air passage.

[0015] According to the technical solution provided in the embodiments of this disclosure, the inner wall of the first connecting sleeve near the second opening is provided with a first protrusion, and a first elastic member is provided between the bottom of the first connecting member and the first protrusion, and the first elastic member is sleeved on all the first connecting parts.

[0016] According to the technical solution provided in the embodiments of this disclosure, the circumferential edge of each opening of the sealing gasket near the second connector extends toward the second connector to form a closed portion, and the inner diameter of each closed portion is larger than the inner diameter of the opening of each branch airway at the end of the second connector near the sealing gasket.

[0017] According to the technical solution provided in the embodiments of this disclosure, the outer wall of the first connecting sleeve is provided with a second protrusion, and the end of the second protrusion away from the headrest rod is provided with a second elastic member sleeved on the outside of the first connecting sleeve. The end of the second elastic member away from the second protrusion is configured to abut against the inner wall of the seat guide sleeve. The outer wall of the first connecting sleeve is also provided with a fifth protrusion, and the fifth protrusion is provided on the side of the second protrusion near the headrest rod. The fifth protrusion away from the end of the first connecting sleeve is configured to abut against the inner wall of the seat guide sleeve.

[0018] According to the technical solution provided in the embodiments of this disclosure, the second boss and / or the fifth boss are provided with a groove, and the groove is configured to reduce the contact area between the second boss and / or the fifth boss and the seat guide sleeve.

[0019] In summary, this disclosure proposes a pluggable gas connection structure for an automotive seat headrest, including a first connecting sleeve disposed within a guide sleeve, a first connecting member disposed within the first connecting sleeve, and a second connecting member that can be plugged into the first connecting member. The end of the second connecting member away from the first connecting member is connected to the headrest rod. The bottom of the first connecting member is provided with a first connecting portion having a first air passage, and the top of the second connecting member is provided with a second connecting portion having a second air passage. The second connecting member has a flow channel communicating with the first and second air passages. The first connecting portion is connected to a first air pipe, and the second connecting portion is connected to the second air pipe. In use, gas is supplied to the gas-using component through the first air passage, the flow channel, and the second air passage. In disassembly, the headrest rod, along with the second air pipe and the second connecting member, is detached from the first connecting member, thereby enabling the headrest to be disassembled. Attached Figure Description

[0020] Figure 1 is a vertical sectional view of the pluggable gas connection structure for a car seat headrest provided in an embodiment of this disclosure;

[0021] Figure 2 is an external view of the pluggable gas connection structure for a car seat headrest provided in an embodiment of this disclosure;

[0022] Figure 3 is a cross-sectional view of the pluggable gas connection structure of the car seat headrest provided in an embodiment of this disclosure;

[0023] Figure 4 is an exploded view of the pluggable gas connection structure of the car seat headrest provided in the embodiment of this disclosure (excluding the first and second gas pipes);

[0024] Figure 5 is a schematic diagram of the second connector structure provided in an embodiment of this disclosure;

[0025] Figure 6 is a schematic diagram of the second connector structure (including the second air port) provided in an embodiment of this disclosure;

[0026] Figure 7 is a schematic diagram of the structure of the sealing gasket provided in an embodiment of this disclosure;

[0027] Figure 8 is a bottom view schematic diagram of the sealing gasket provided in the embodiment of this disclosure;

[0028] Figure 9 is an external view of the first connector provided in an embodiment of this disclosure;

[0029] Figure 10 is an external view of the first connecting sleeve provided in an embodiment of this disclosure;

[0030] Figure 11 is a schematic diagram of the pneumatic system provided in an embodiment of this disclosure;

[0031] Figure 12 is a magnified view of part A in Figure 11;

[0032] Figure 13 is a cross-sectional view of the pneumatic system provided in an embodiment of this disclosure;

[0033] Figure 14 is a schematic diagram of the structure of the pneumatic system of the massage air bag provided in the embodiment of this disclosure.

[0034] The text labels in the diagram represent: 1. Headrest rod; 21. First air tube; 22. Second air tube; 3. Positioning guide sleeve; 31. Pressure relief groove; 32. Limiting part; 33. Fixing part; 34. Buckle; 35. Spike; 4. First connecting sleeve; 41. First boss; 42. Second boss; 43. Positioning groove; 44. Fifth boss; 5. Second connector; 51. Second connecting part; 511. Second airway; 52. Third boss; 53. Second guide part; 54. Second air port; 55. Branch airway; 6. First connector; 61. Third space; 62. Fourth space; 63. First connecting part; 63. First air passage; 64. Positioning structure; 65. First guide part; 7. Sealing gasket; 71. First through hole; 72. Fourth boss; 73. Sealing part; 81. First elastic element; 82. Second elastic element; 9. Headrest body; 91. Rear support body; 92. Rear air bag; 93. Air bag support body; 94. Front air bag; 95. Front support body; 96. Seat guide sleeve; 97. Massage support air bag; 10. Air source; 11. Headrest pluggable air connection structure. Detailed Implementation

[0035] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other. This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] As mentioned in the background section, this disclosure proposes a pluggable gas connection structure for a car seat headrest. The car seat includes a headrest body 9, and at least one headrest rod 1 is provided at the bottom of the headrest body 9. The headrest rod 1 is configured to connect with a seat guide sleeve 96 inside the car seat. The pluggable gas connection structure 11 is configured such that the headrest rod 1 is inside the seat guide sleeve 96.

[0038] In this embodiment, as shown in Figures 1-12, the headrest pluggable gas connection structure 11 includes:

[0039] The first connecting sleeve 4 is disposed inside the seat guide sleeve 96, and has a first space inside, and includes a first opening and a second opening along the first direction.

[0040] The first connector 6 is disposed in the first space, and the bottom of the first connector 6 is provided with at least one first connecting part 63. The first connecting part 63 has a first airway 631 communicating with the second space. The first connecting part 63 is configured to be connected to the first air tube 21.

[0041] The second connector 5 is disposed in the first space and is inserted into the first connector 6. The second connector 5 forms a flow space with the first connector 6 at the end near the first connecting part 63. The first air passage 631 communicates with the flow space, and the second connector 5 has a flow channel communicating with the flow space. The second connector 5 is provided with at least one second connecting part 51 at the end near the first opening. The second connecting part 51 has a second air passage 511 communicating with the flow channel. The second connecting part 51 is configured to connect with the second air tube 22. The end of the second connector 5 away from the first connector 6 and the second connecting part 51 are fixedly disposed in the headrest rod 1.

[0042] The first direction is the extension direction of the headrest rod 1; the first connecting sleeve 4 can protect the internal precision structure and prevent it from being damaged or corroded by external physical collisions, dust.

[0043] Specifically, the first connector 6 has a second space, which includes a third space 61 and a fourth space 62 with gradually decreasing inner diameters from top to bottom. The first airway 631 is formed by a through hole that passes through the bottom of the first connector 6 and the first connecting part 63. The through hole forms a first air port at the bottom of the first connector 6. Optionally, there are three first connecting parts 63. The three first connecting parts 63 are arranged in a circumferential array around the axis of the first connector 6. The air pipe connected to the three first connecting parts 63 can be an independent first air pipe 21 or an integrated combined air pipe. The combined air pipe includes an airway corresponding to the first airway 631.

[0044] It is understood that the application scenario of this disclosure can be a headrest with an air bag for massage or adjusting the headrest position, and the second air tube 22 is configured to inflate the air bag; the bottom of the second connector 5 is placed in the fourth space 62, and its outer wall abuts against the inner wall of the fourth space 62; the middle outer wall of the second connector 5 is provided with a third protrusion 52, and the end of the third protrusion 52 away from the second connector 5 abuts against the inner wall of the third space 61; the outer wall of the end of the second connector 5 away from the first connector 6 is engaged with the inner wall of the headrest rod 1. Optionally, the second connecting part 51 and the first connecting part 63 have the same structure, and the second air tube 22 and the first air tube 21 have the same structure, which will not be described in detail here. When the headrest rod 1 is disassembled, the headrest rod 1 drives the second connector 5 and the second air tube 22 to disengage from the first connector 6 and the first connecting sleeve 4, thereby completely separating the headrest body 9 from the car seat.

[0045] In an optional embodiment, a positioning guide sleeve 3 is provided at the first opening. The positioning guide sleeve 3 is configured to guide the headrest rod 1 to drive the second connector 5 to be inserted into the first connector 6.

[0046] The positioning guide sleeve 3 provides guidance for the insertion of the second connector 5 and the first connector 6, which prevents the second connector 5 from being unable to enter the fourth space 62 and improves the insertion efficiency.

[0047] In an optional embodiment, the outer wall of the headrest rod 1 near the second connector 5 is provided with a groove, the positioning guide sleeve 3 is engaged with the inner wall of the first connecting sleeve 4, and the inner wall is provided with a buckle 34, which is engaged in the groove.

[0048] Specifically, the positioning guide sleeve 3 includes a fixing part 33 and a limiting part 32. The fixing part 33 is cylindrical and located inside the first connecting sleeve 4. The top edge of the fixing part 33 extends outward to form the limiting part 32, which is located outside the top edge of the first connecting sleeve 4. A buckle 34 is provided on the inner wall of the fixing part 33, and the outer wall of the fixing part 33 has long and narrow protrusions 35. It can be understood that by fixing the positioning guide sleeve 3 and the inner wall of the first connecting sleeve 4 with the buckle 34, the limiting part 32 improves the stability of the positioning guide sleeve 3 and the first connecting sleeve 4, and avoids the headrest rod 1 from being inserted too deeply, which would cause the headrest rod 1 to directly rub and collide with the first connecting piece 6.

[0049] In an optional embodiment, the outer wall of the positioning guide sleeve 3 is provided with a force-relieving groove 31, which is configured to release the squeezing force when the headrest rod 1 and the positioning guide sleeve 3 are inserted.

[0050] Specifically, there are at least two pressure-relieving grooves 31, which are respectively located at opposite positions on the outer wall of the positioning guide sleeve 3. When the second connector 5 and the first connector 6 are inserted, the pressure exerted by the headrest rod 1 on the positioning guide sleeve 3 causes it to deform, thus preventing the positioning guide sleeve 3 from breaking.

[0051] In an optional embodiment, the buckle 34 is a protrusion formed by extending from the inner wall of the positioning guide sleeve 3 toward the center, and the end of the protrusion away from the positioning guide sleeve 3 is curved.

[0052] Specifically, the buckle 34 is not long and sharp like the spike 35, but its curved surface has an arc of 50°. The buckle 34 is set to be small to prevent greater resistance when the headrest rod 1 is pulled out, and to pull out the positioning guide sleeve 3 at the same time, so as to ensure that the headrest rod 1 can be inserted and removed smoothly next time.

[0053] In an optional embodiment, the flow channel includes branch airways 55 that are connected to the second airway 511, and each branch airway 55 passes through the second connector 5.

[0054] Specifically, the number of branch air passages 55 is the same as the number of the first connecting part 63 and the second connecting part 51, and they are correspondingly arranged. The branch air passage 55 is formed by a through hole penetrating the second connecting member 5. A second air port 54 is formed at the bottom of the second connecting member 5, and a third air port is formed at its top. The third air port communicates with the second air passage 511. Optionally, the second connecting part 51 and the second connecting member 5 are integrally formed, and the branch air passage 55 and the second air passage 511 are integrally formed.

[0055] In an optional embodiment, the number of first air passages 631 and second air passages 511 are the same, and they are arranged correspondingly. A sealing gasket 7 is provided in the flow space. A first through hole 71 is provided through the first air passage 631 and the second air passage 511 at the corresponding positions. The two ends of the first through hole 71 are respectively connected to the corresponding first air passage 631 and the second air passage 511. The two ends of the sealing gasket 7 along the first direction abut against the second connector 5 and the first connector 6 respectively.

[0056] Specifically, the two ends of the first through hole 71 are connected to the first air port and the second air port 54, respectively. By setting the sealing gasket 7, the gas is limited to flow from the first air pipe 21, the first air passage 631, the first through hole 71, the branch air passage 55, and the second air passage 511 to the second air pipe 22, thus preventing air leakage. In addition, the outer wall of the sealing gasket 7 is provided with a fourth protrusion 72. The end of the fourth protrusion 72 away from the sealing gasket 7 abuts against the inner wall of the fourth space 62, thus fixing the sealing gasket 7.

[0057] In an optional embodiment, the inner wall of the first connector 6 is provided with a first guide portion 65, and the outer walls of the second connector 5 and the sealing gasket 7 are respectively provided with a second guide portion 53. The first guide portion 65 and the second guide portion 53 are configured to correspond to the first through hole 71 and the first air passage 631 and the second air passage 511.

[0058] Specifically, the inner wall of the fourth space 62 of the first connector extends inward to form a first guide portion 65. The outer wall of the sealing gasket 7 and the outer wall of the second connector 5 extending into the fourth space 62 are both provided with second guide portions 53 that mate with the first guide portion 65. During insertion, the first guide portion 65 is placed within the second guide portion 53, thereby achieving circumferential positioning and ensuring that the first through hole 71 is aligned with both the first air port and the second air port 54. Furthermore, a positioning structure 64 is provided on the top outer wall of the first connector 6, and a positioning groove 43 mates with the positioning structure 64 on the first connecting sleeve 4. The positioning structure 64 is inserted into the positioning groove 43, improving the alignment of the insertion air passage and enhancing the stability of the insertion.

[0059] In an optional embodiment, the inner wall of the first connecting sleeve 4 near the second opening is provided with a first protrusion 41, and a first elastic member 81 is provided between the bottom of the first connecting member 6 and the first protrusion 41. The first elastic member 81 is sleeved on all the first connecting portions 63.

[0060] Specifically, the first protrusion 41 has a second opening in the middle. During the insertion and removal of the pneumatic plug or when subjected to external vibration and impact, the first elastic element 81 can act as a buffer and shock absorber. The first elastic element 81 is in a compressed state during insertion, applying an upward force to the second connector 5 to prevent it from hitting the bottom of the first connecting sleeve 4 and breaking during installation. In addition, the first elastic element 81 exerts an upward force on the first connector 6, ensuring the airtightness of the insertion.

[0061] Optionally, the first elastic element 81 may be a spring, sponge, metal sheet, or other elastic structure and material.

[0062] In an optional embodiment, the circumferential edge of each opening of the sealing gasket 7 near the second connector 5 extends toward the second connector 5 to form a closure portion 73, and the inner diameter of each closure portion 73 is larger than the inner diameter of the opening of each branch air passage 55 at the end of the second connector 5 near the sealing gasket 7.

[0063] Specifically, the sealing part 73 is cylindrical. When the first elastic member 81 deforms and exerts an upward force on the first connecting member 6 and the sealing gasket 7, the inner diameter of the sealing part 73 is larger than the inner diameter of the second air port 54. Therefore, the sealing part 73 wraps around the second air port 54 to prevent air leakage.

[0064] In an optional embodiment, the outer wall of the first connecting sleeve 4 is provided with a second protrusion 42. The end of the second protrusion 42 away from the headrest rod 1 is provided with a second elastic member 82 sleeved outside the first connecting sleeve 4. The end of the second elastic member 82 away from the second protrusion 42 abuts against the inner wall of the seat guide sleeve 96. Furthermore, the outer wall of the first connecting sleeve 4 is also provided with a fifth protrusion 44. The fifth protrusion 44 is located on the side of the second protrusion 42 near the headrest rod 1, and the end of the fifth protrusion 44 away from the first connecting sleeve 4 is configured to abut against the inner wall of the seat guide sleeve 96.

[0065] Specifically, the second elastic element 82 is in a compressed state during insertion, giving the first connecting sleeve 4 an upward force to prevent it from hitting the seat guide sleeve 96 during insertion and installation. By setting the fifth protrusion 44 to abut against the seat guide sleeve 96, it prevents the headrest rod 1 from being pulled out along with the first connecting sleeve 4.

[0066] Optionally, the second elastic element 82 may be a spring, sponge, metal sheet, or other elastic structure and material.

[0067] In an optional embodiment, the outer wall of the second connector 5 is provided with a third protrusion 52, the end of the third protrusion 52 away from the second connector 5 abuts against the inner wall of the first connector 6, and the end of the headrest rod 1 near the second opening abuts against the third protrusion 52.

[0068] Specifically, the third protrusion 52 abuts against the inner wall of the first connector 6, improving the stability of the insertion. The bottom end of the headrest rod 1 abuts against the third protrusion 52. The third protrusion 52 prevents the headrest rod 1 from disengaging from the second connector 5 and being inserted too deeply, thereby damaging the first connector 6.

[0069] In an optional embodiment, the second boss 42 and / or the fifth boss 44 are provided with grooves configured to reduce the contact area between the second boss 42 and / or the fifth boss 44 and the seat guide sleeve 96, thereby reducing frictional noise.

[0070] Based on the pluggable air connection structure for car seat headrests proposed in the above embodiments, as shown in Figures 11-14, this disclosure proposes a pneumatic system including a headrest body 9, which includes an air bag. The air bag is connected to the pluggable air connection structure 11 of the headrest via a second air pipe 22.

[0071] Specifically, the headrest body 9 includes a front support body 95 and a rear support body 91 arranged front to back. A fifth space is formed between the front support body 95 and the rear support body 91. An airbag support body 93 is provided in the fifth space. The airbag support body 93 divides the fifth space into a sixth space and a seventh space arranged front to back. The airbag includes a front airbag 94 located in the sixth space and a rear airbag 92 located in the seventh space. The airbag support body 93 has a third air passage in the middle. The third air passage is connected to the sixth space through a fourth air port and to the seventh space through a fifth air port.

[0072] The first air tube 21 and the second air tube 22 can be independent air tubes or tearable combined air tubes. The second air tube 22 in the headrest pluggable air connection structure 11 passes through the headrest rod 1, extends to the third air passage, and is connected to the front air bag 94 and the rear air bag 92 through the fourth and fifth air ports. The inflation of the front air bag 94 or the rear air bag 92 is controlled by independently controlling the air intake of the first air tube 21. The car seat is also equipped with an air source 10, which is connected to the first air tube 21. When the air source 10 inflates the first air tube 21 corresponding to the front air bag 94, gas is supplied to the front air bag 94 through the second air tube 22 corresponding to the first air tube 21. The inflation of the front air bag 94 causes the front support body 95 to move forward.

[0073] Furthermore, the air bag also includes a massage support air bag 97, which is located on the front support body 95. The second air tube 22 inflates or deflates the massage support air bag 97 to achieve the massage function.

[0074] In summary, this disclosure proposes a pluggable gas connection structure and pneumatic system for an automotive seat headrest. By setting a first connecting sleeve 4, a first connecting member 6, and a second connecting member 5, gas is supplied to the gas-using component through a first air passage 631, a flow channel, and a second air passage 511 during use. Simultaneously, during disassembly, the headrest rod 1 drives the second connecting member 5 and the second air pipe 22 to detach from the first connecting member 6 and the first connecting sleeve 4, thereby completely separating the headrest body 9 from the automotive seat and thus achieving the disassembly of the headrest.

[0075] The above description is merely a preferred embodiment of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features disclosed in this disclosure that have similar functions. Industrial applicability

[0076] This disclosure proposes a pluggable gas connection structure for a car seat headrest. During disassembly, the headrest rod can drive the second connector and the second air pipe to detach from the first connector and the first connecting sleeve, thereby completely separating the headrest body from the car seat and thus achieving the disassembly of the headrest.

Claims

1. A pluggable gas connection structure for a car seat headrest, the car seat including a headrest body (9), at least one headrest rod (1) being provided at the bottom of the headrest body (9), the headrest rod (1) being configured to connect with a seat guide sleeve (96) inside the car seat, the pluggable gas connection structure (11) being disposed within the headrest rod (1) and the seat guide sleeve (96), characterized in that, include: The first connecting sleeve (4) is disposed inside the seat guide sleeve (96), and has a first space inside, and includes a first opening and a second opening along the first direction; A first connector (6) is disposed in the first space, and the first connector (6) has at least one first connecting part (63) at one end near the second opening. The first connecting part (63) has a first airway (631) and is configured to connect to the first air tube (21). The second connector (5) is disposed in the first space and is inserted into the first connector (6). The second connector (5) forms a flow space with the first connector (63) at the end near the first connector (63). The first air passage (631) communicates with the flow space. The second connector (5) has a flow channel communicating with the flow space. The second connector (5) is provided with at least one second connector (51) at the end near the first opening. The second connector (51) has a second air passage (511) communicating with the flow channel. The second connector (51) is configured to connect with the second air tube (22). The end of the second connector (5) away from the first connector (6) and the second connector (51) are fixedly disposed in the headrest rod (1).

2. The pluggable gas connection structure for a car seat headrest according to claim 1, characterized in that, A positioning guide sleeve (3) is provided at the first opening. The positioning guide sleeve (3) is configured to guide the headrest rod (1) to drive the second connector (5) to be inserted into the first connector (6).

3. The pluggable gas connection structure for a car seat headrest according to claim 2, characterized in that, The outer wall of the positioning guide sleeve (3) is provided with a pressure relief groove (31), which is configured to release the squeezing force when the headrest rod (1) and the positioning guide sleeve (3) are inserted.

4. The pluggable gas connection structure for a car seat headrest according to claim 3, characterized in that, The number of the force-relieving grooves (31) is at least two, and the at least two force-relieving grooves (31) are respectively provided at opposite positions on the outer wall of the positioning guide sleeve (3).

5. The pluggable gas connection structure for a car seat headrest according to any one of claims 2 to 4, characterized in that, The headrest rod (1) has a groove on the outer wall near the second connector (5). The positioning guide sleeve (3) is engaged with the inner wall of the first connecting sleeve (4). The inner wall of the positioning guide sleeve (34) is provided with a buckle (34), which is engaged in the groove.

6. The pluggable gas connection structure for a car seat headrest according to claim 5, characterized in that, The positioning guide sleeve (3) includes a fixing part (33) and a limiting part (32). The fixing part (33) is located inside the first connecting sleeve (4). The top edge of the fixing part (33) extends outward to form the limiting part (32). The limiting part (32) is located outside the top edge of the first connecting sleeve (4). The buckle (34) is located on the inner wall of the fixing part (33).

7. The pluggable gas connection structure for a car seat headrest according to claim 5 or 6, characterized in that, The buckle (34) is a protrusion formed by extending from the inner wall of the positioning guide sleeve (3) towards the center, and the end of the protrusion away from the positioning guide sleeve (3) is curved.

8. The pluggable gas connection structure for a car seat headrest according to any one of claims 1 to 7, characterized in that, The circulation channel includes branch airways (55) that are connected to the second airway (511), and each branch airway (55) passes through the second connector (5).

9. The pluggable gas connection structure for a car seat headrest according to claim 8, characterized in that, The number of the first air passage (631) and the second air passage (511) are the same, and they are arranged correspondingly. A sealing gasket (7) is provided in the flow space. A first through hole (71) is provided through the first air passage (631) and the second air passage (511) respectively. The two ends of the first through hole (71) are respectively connected to the first air passage (631) and the second air passage (511). The two ends of the sealing gasket (7) along the first direction are respectively abutted against the second connector (5) and the first connector (6).

10. The pluggable gas connection structure for a car seat headrest according to claim 9, characterized in that, The inner wall of the first connector (6) is provided with a first guide portion (65), and the outer walls of the second connector (5) and the sealing gasket (7) are respectively provided with a second guide portion (53). The first guide portion (65) and the second guide portion (53) are configured to correspond to the first through hole (71), the first air passage (631), and the second air passage (511).

11. The pluggable gas connection structure for a car seat headrest according to any one of claims 1 to 10, characterized in that, The first connecting sleeve (4) has a first protrusion (41) on the inner wall near the second opening. A first elastic member (81) is provided between the bottom of the first connecting member (6) and the first protrusion (41). The first elastic member (81) is sleeved on all the first connecting parts (63).

12. The pluggable gas connection structure for a car seat headrest according to claim 11, characterized in that, The circumferential edges of each opening of the sealing gasket (7) near the second connector (5) extend toward the second connector (5) to form a closed portion (73), and the inner diameter of each closed portion (73) is larger than the inner diameter of the opening of each branch airway (55) at the end of the second connector (5) near the sealing gasket (7).

13. The pluggable gas connection structure for a car seat headrest according to claim 11, characterized in that, The outer wall of the second connector (5) is provided with a third protrusion (52). The end of the third protrusion (52) away from the second connector (5) abuts against the inner wall of the first connector (6). The end of the headrest rod (1) near the second opening abuts against the third protrusion (52).

14. The pluggable gas connection structure for a car seat headrest according to any one of claims 1 to 13, characterized in that, The outer wall of the first connecting sleeve (4) is provided with a second protrusion (42). The end of the second protrusion (42) away from the headrest rod (1) is provided with a second elastic member (82) sleeved outside the first connecting sleeve (4). The end of the second elastic member (82) away from the second protrusion (42) is configured to abut against the inner wall of the seat guide sleeve (96). The outer wall of the first connecting sleeve (4) is also provided with a fifth protrusion (44). The fifth protrusion (44) is located on the side of the second protrusion (42) near the headrest rod (1). The end of the fifth protrusion (44) away from the first connecting sleeve (4) is configured to abut against the inner wall of the seat guide sleeve (96).

15. The pluggable gas connection structure for a car seat headrest according to claim 14, characterized in that, The second boss (42) and / or the fifth boss (44) are provided with grooves, which are configured to reduce the contact area between the second boss (42) and / or the fifth boss (44) and the seat guide sleeve (96).

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