Leg and foot massage apparatus

Abstract

The present application provides a leg and foot massage apparatus. The leg and foot massage apparatus is mounted at a tail end of a seat part of a massage chair and comprises a foot placement frame (10) provided with two foot slots (101) for accommodating feet, and a leg placement frame (20) located above the foot placement frame (10) and provided with placement grooves (201) for placement of lower legs. An air bag (30) is arranged on an inner wall surface of the leg placement frame (20) or / and the foot placement frame (10). A surface of the air bag (30) is provided with a massage head (302) for massaging an acupuncture point of a human body. The air bag (30) is unilaterally mounted on the inner wall surface of the leg placement frame (20) or / and the foot placement frame (10). The leg placement frame (20) of the present application adopts a semi-open and semi-enclosed structure, so that when the lower legs of the human body are subjected to pounding and kneading massage, the front sides of knee ends do not collide with the leg placement frame, thereby improving the safety and adaptability of the overall structure, solving the problem of insufficient massage strength on the acupuncture points of the human body due to the large overall expansion area of the air bag in the leg and foot massage apparatus, and providing a better massage experience for the user.

Description

Leg and foot massage device Technical Field

[0001] The invention relates to a leg and foot massage device. Background Art

[0002] Leg and foot massage devices generally perform regular massages on both sides of the calves and insteps to relax muscles and bones, eliminate fatigue, and prevent and treat diseases.

[0003] Commercially available leg and foot massage devices often massage human acupuncture points by adding air bags in the devices. However, since human acupuncture points require precise massage to achieve the corresponding health care effects, the air bags have a large expansion and contraction area when inflated and deflated, and therefore cannot precisely massage the corresponding human acupuncture points. In addition, the massage intensity does not meet the massage requirements, resulting in poor massage experience, insufficient massage intensity, and poor health care effects from the leg and foot massage devices.

[0004] Therefore, the present application designs a leg and foot massage device to address one or more of the above problems. Technical Solutions

[0005] The present invention provides a leg and foot massage device, which can effectively solve the above problems.

[0006] The present invention is achieved in that:

[0007] A leg and foot massage device is installed at the end of the massage chair seat, comprising a foot rest frame having two foot grooves for accommodating feet and a leg rest frame located above the foot rest frame and having a placement groove for calf placement.

[0008] The leg placement frame includes a vertical plate and a baffle plate located above the foot placement frame, the baffle plate and the vertical plate enclosing a placement groove for the calf; the front ends of the two baffle plates are bent inward toward opposite sides to form an arc-shaped curve that wraps the outer side of the knee end of the calf, and the front part of the knee end of the human calf placed in the placement groove can extend between the bent end of the baffle plate and the front end of the vertical plate;

[0009] An air bag is arranged on the inner wall surface of the leg rack or / and the foot rack, and a massage head for massaging acupuncture points of the human body is arranged on the surface of the air bag; the air bag is unilaterally installed on the inner wall surface of the leg rack or / and the foot rack.

[0010] As a further improvement, the airbag is unilaterally mounted on the inner wall surface of the leg placement rack and / or the foot placement rack to form a single-layer airbag layer structure; when the single-layer airbag layer is inflated or deflated, the airbag is inflated away from the unilateral mounting end by a greater amount than the unilateral mounting end of the airbag, so that the airbag-actuated massage head swings back and forth with the unilateral mounting end as the rotation center to massage the acupuncture points of the human body.

[0011] As a further improvement, the airbag is an airbag layer structure of at least two layers, and only the airbag layer close to the inner wall of the leg placement rack and / or the foot placement rack is unilaterally installed on the inner wall of the leg placement rack and / or the foot placement rack; when the airbag is inflated and deflated, the outer airbag layer moves back and forth relative to the airbag layer installed on the unilateral side, so that the airbag actuates the massage head to push and rub the acupuncture points of the human body back and forth.

[0012] As a further improvement, the airbag is a structure of at least two layers of airbag layers, and each airbag layer of the airbag is unilaterally mounted on the inner wall of the leg placement rack and / or the foot placement rack. When the multi-layer airbag layer is inflated or deflated, the inflation amount of the airbag away from the unilateral mounting end is greater than that of the unilateral mounting end of the airbag, so that the airbag-actuated massage head swings back and forth with the unilateral mounting end as the rotation center to massage the acupuncture points of the human body.

[0013] As a further improvement, the airbag includes a foot airbag arranged corresponding to the foot groove for massaging the acupoints of the human foot, and an upright block for dividing the two foot grooves is arranged in the middle position of the foot placement frame; the foot airbag is unilaterally installed on the opposite sides of the upright block.

[0014] As a further improvement, the massage head on the foot airbag is positioned directly opposite the Sanyinjiao acupuncture point of the human body in the foot groove.

[0015] As a further improvement, the airbag includes a leg airbag for massaging the acupuncture points on the human leg, which is arranged corresponding to the placement groove. The leg airbag is installed on one side at the bending part of the inner wall of the two baffles to massage the acupuncture points on the outside of the human calf.

[0016] As a further improvement, the massage head on the leg airbag is arranged to face the Zusanli acupoint of the human body in the placement groove.

[0017] As a further improvement, the air nozzle on the back of the airbag is fixedly connected to the middle position of the back of the airbag, and a hook slot hole for the air bag nozzle to extend into is opened on the inner wall of the leg placement rack and / or the foot placement rack. The air nozzle hook accommodated in the hook slot hole anchors the hole wall of the hook slot hole close to the single-sided installation end of the airbag to increase the single-sided installation area of ​​the airbag.

[0018] As a further improvement, the air nozzle has an interface portion vertically fixed to the back of the airbag and a hook and clamp portion vertically fixed to the end of the interface portion, the interface portion of the air nozzle extending into the hook slot hole is located in the hook slot hole, and the hook and clamp portion is located in the accommodating cavity of the baffle plate or the spacing cavity of the upright block and is arranged toward the single-sided mounting end of the airbag; the length of the interface portion of the air nozzle is greater than the axial length of the hook slot hole, and the cross-sectional area of ​​the interface portion of the air nozzle is smaller than the size of the hook slot hole opening. Beneficial effects

[0019] The beneficial effects of the present invention are:

[0020] The leg rack of the present application adopts a semi-open and semi-wrapped structure, which ensures that the front of the knee end will not collide with the leg rack when the human calf is being massaged, thereby improving the safety and adaptability of the overall structure; and the air bag with a massage head on the surface is installed on the inner wall of the leg rack or / and the foot rack in a unilateral installation manner, which improves the problem of insufficient massage force on the human acupoints due to the large overall expansion area of ​​the air bag in the leg and foot massage device, can bring a better massage experience to the user, and improve the health care effect of the leg and foot massage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0022] FIG1 is a schematic diagram of the overall structure of the present invention;

[0023] FIG2 is a schematic structural diagram of an airbag in Embodiment 1 of the present invention;

[0024] FIG3 is a schematic structural diagram of an airbag in a second embodiment of the present invention;

[0025] FIG4 is a schematic diagram of the structure of the airbag in Example 3 of the present invention;

[0026] FIG5 is a structural perspective view showing the assembly relationship between the leg airbag and the baffle plate of the present invention;

[0027] FIG6 is a structural perspective view showing the assembly relationship between the foot airbag and the upright block of the present invention;

[0028] FIG7 is a schematic cross-sectional view of the portion DD in FIG6 of the present invention;

[0029] FIG8 is a schematic diagram showing the assembly position relationship between the airbag nozzle and the hook slot hole and the threaded hole according to the present invention.

[0030] FIG9 is a plan view of the leg placement rack;

[0031] FIG10 is a schematic diagram showing the leg airbag of the present invention performing massage on the acupuncture points of the human leg when inflating and deflating.

[0032] FIG11 is an enlarged schematic diagram of points A and B in FIG10 of the present invention.

[0033] FIG12 is a schematic diagram showing the state of the foot airbag of the present invention performing acupuncture and massaging on the acupuncture points of the human foot when the air is inflated and deflated.

[0034] Figure 13 is an enlarged schematic diagram of the present invention at C and D in Figure 9;

[0035] FIG14 is a schematic diagram showing the state of the foot airbag of the present invention performing push and knead massage on the acupuncture points of the human foot when inflating and deflating.

[0036] FIG15 is an enlarged schematic diagram of points E and F in FIG14 of the present invention.

[0037] The accompanying drawings are marked as follows:

[0038] 10. Foot rest; 11. Upright block; 111. Spacer cavity; 101. Foot trough;

[0039] 20. Leg rack; 21. Vertical board; 22. Enclosure board; 201. Placement slot; 221. Accommodation cavity; 23. Backboard;

[0040] 30. Airbag; 31. Leg airbag; 32. Foot airbag; 301. Air nozzle; 3011. Interface; 3012. Hook and lock; 302. Massage head; 303. Airbag layer; 3031. Through hole;

[0041] 40. Threaded hole;

[0042] 50. Hook slot hole;

[0043] 60. Screws. Modes for Carrying Out the Invention

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0046] As shown in Figure 1, a leg and foot massage device is installed at the end of the massage chair seat, including a foot rack 10 with two foot grooves 101 for accommodating feet and a leg rack 20 located above the foot rack 10 and having a placement groove 201 for calf placement. The foot rack 10 and the leg rack 20 are installed at the end of the massage chair seat through a hanging bracket (not shown in the figure). It should be noted here that the foot rack 10 and the leg rack 20 can be movably connected or fixedly connected.

[0047] As shown in Figures 1 to 4, an airbag 30 is provided on the inner wall surface of the leg rack 20 and / or the foot rack 10, and the surface of the airbag 30 has a massage head 302 for massaging the acupoints of the human body; the airbag 30 is installed on one side on the inner wall surface of the leg rack 20 and / or the foot rack 10.

[0048] This application is divided into the following different embodiments according to the number of layers of the airbag 30 and / or the single-sided installation method of the airbag 30:

[0049] Example 1:

[0050] As shown in Figures 1, 3 and 9, the airbag 30 is a single-layer airbag layer 303 structure that is unilaterally installed on the inner wall surface of the leg placement rack 20 and / or the foot placement rack 10; when the single-layer airbag layer 303 is inflated or deflated, the inflation amount of the airbag 30 away from the unilateral installation end is greater than the unilateral installation end of the airbag 30, so that the airbag 30 actuates the massage head 302 to swing back and forth with the unilateral installation end as the rotation center to massage the acupuncture points of the human body.

[0051] Embodiment 2:

[0052] As shown in Figures 1, 4, 14 and 15, the airbag 30 is a structure of at least two layers of airbag layers 303, and only the airbag layer 303 close to the inner wall of the leg rack 20 or / and the foot rack 10 is unilaterally installed on the inner wall of the leg rack 20 or / and the foot rack 10. When the airbag 30 is inflated and deflated, the outer airbag layer 303 moves back and forth relative to the airbag layer 303 installed on the unilateral side, so that the airbag 30 actuates the massage head 302 to push and rub the acupuncture points of the human body back and forth.

[0053] Example 3:

[0054] As shown in Figures 1, 2 and 10 to 13, the airbag 30 is a structure of at least two layers of airbag layers 303. Each airbag layer 303 of the airbag 30 is unilaterally mounted on the inner wall surface of the leg placement frame 20 and / or the foot placement frame 10. When the multi-layer airbag layer 303 is inflated or deflated, the inflation amount of the airbag 30 away from the unilateral mounting end is greater than the unilateral mounting end of the airbag 30, so that the airbag 30 actuates the massage head 302 to swing back and forth with the unilateral mounting end as the rotation center to massage the acupuncture points of the human body.

[0055] It should be noted here that, as shown in Figures 10 to 13, embodiment three sets the airbag 30 as a multi-layer airbag layer 303 of at least two layers, which also has the following effects: when controlling the inflation and deflation of the airbag 30, each layer of the airbag 30 is opened or folded layer by layer in a fan-like shape, thereby actuating the massage head 302 on the airbag 30 to gradually and evenly swing back and forth to knead the acupuncture points of the human body.

[0056] As shown in Figures 6, 7 and 8, the airbag 30 includes a foot airbag 32 for massaging the acupoints of the human foot, which is arranged corresponding to the foot groove 101, and a leg airbag 31 for massaging the acupoints of the human leg, which is arranged corresponding to the placement groove 201; in this embodiment, the air nozzle 301 on the back of the airbag 30 is connected to an external pressure source (such as a cylinder, a compressor, etc.) through a connecting tube (not shown in the figure), and the pressure source is controlled by the control circuit of the solenoid valve (not shown in the figure) to inflate and deflate each airbag 30 synchronously or individually.

[0057] As shown in Figures 6, 7, 8, 12 and 13, an upright block 11 for dividing the two foot grooves 101 is provided in the middle position of the foot rest frame 10, and the leg rest frame 20 includes a vertical plate 21 located above the upright block 11 and a baffle plate 22 located above the opposite sides of the leg rest frame 20 and enclosed with the vertical plate 21 to form a placement groove 201 for calf placement. A back plate 23 connecting the three together is provided at the tail ends of the vertical plate 21 and the baffle plate 22, and the leg rest frame 20 is installed as a whole at the end of the seat portion of the massage chair through the back plate 23.

[0058] As shown in Figure 9, the front ends of the two baffles 22 are bent inward toward the opposite sides to form an arc-shaped curve that wraps the outer side of the knee end of the calf. The space between the bent ends of the baffles 22 and the front ends of the vertical plates 21 allows the front part of the knee end of the calf of the human body placed in the placement groove 201 to extend. When the massage head 302 on the airbag 30 massages the acupuncture points on the outer side of the knee end of the calf of the human body, the front part of the knee end of the calf of the human body placed in the placement groove 201 extends out of the leg placement frame 20. This ensures that the front side of the knee end of the human calf will not collide with the leg placement frame 20 when the human calf is being massaged, thereby improving the safety and adaptability of the overall structure.

[0059] As shown in Figures 7, 12 and 13, the foot airbag 32 is unilaterally installed on the opposite sides of the upright block 11. The massage head 302 on the foot airbag 32 is set at a position facing the Sanyinjiao acupoint of the human body in the foot groove 101. For example, massaging the Sanyinjiao acupoint has a significant effect on improving endocrine disorders and preventing and treating diseases such as hypertension, diabetes, and coronary heart disease. In other embodiments, the foot airbag 32 can also be installed at the position corresponding to the acupoint of the foot placement frame 10 according to the user's preference, so that the massage head 302 on the foot airbag 32 can perform rubbing and massage the corresponding acupoint.

[0060] As shown in Figures 10, 11, 14 and 15, the leg airbag 31 is unilaterally installed at the bend of the inner wall of the two baffles 22 to massage the acupuncture points on the outside of the human calf. The massage head 302 on the leg airbag 31 is set to face the Zusanli acupuncture point of the human body in the placement groove 201 as an example. Massaging the Zusanli acupuncture point is beneficial to improving gastrointestinal diseases, lower limb paralysis, mental illness, surgical diseases, and consumptive symptoms. In other embodiments, the leg airbag 31 can also be installed at the position of the corresponding acupuncture point of the leg placement rack 20 according to the user's preference, so that the massage head 302 on the leg airbag 31 can perform rubbing and massage the corresponding acupuncture points.

[0061] As shown in Figures 2, 3, 4, 5 and 6, at least two threaded holes 40 for screwing screws 60 are provided on the opposite sides of the upright block 11 and the bending part of the inner wall of the baffle plate 22, and the single-side mounting end of the leg airbag 31 or the foot airbag 32 is provided with a through hole 3031 corresponding to the threaded hole 40 and for the screw 60 to pass through the hole; it should be noted here that in embodiment one, each airbag layer 303 is provided with a through hole 3031 on the single-side mounting end, in embodiment two, the single-layer airbag layer 303 is provided with a through hole 3031 on the single-side mounting end, and in embodiment three, only the inner airbag layer 303 is provided with a through hole 3031 on the single-side mounting end.

[0062] As shown in Figures 1, 5, and 6, hook slots 50 are provided on opposite sides of the upright block 11 and at the bend in the inner wall of the baffle plate 22, through which the air nozzle 301 on the back of the airbag 30 extends. The baffle plate 22 has an interior cavity 221 connected to the hook slots 50 on the baffle plate 22 and for accommodating the air nozzle 301 of the airbag 30. The upright block 11 has a partition cavity 111 connected to the hook slots 50 on the upright block 11 and for accommodating the airbag 30. In actual use, the bottom and walls of the foot groove 101, the inner wall of the baffle plate 22, and the opposite sides of the upright plate 21 where they come into contact with human skin are all fitted with soft, elastic leather covers (not shown). The leg and foot airbags 31 and 32 are also encased in these leather covers.

[0063] As shown in Figures 2-4 and 7-8, the air nozzle 301 on the back of the airbag 30 is fixedly connected to the center of the back of the airbag 30. The air nozzle 301, housed in the groove, hooks and anchors the wall of the hook slot 50 near the threaded hole 40, thereby increasing the single-sided installation area of ​​the airbag 30 and the leg airbag 31 or foot airbag 32, greatly improving the installation stability of each airbag 30. It should be noted that during the inflation and deflation process of the airbag 30, the air nozzle 301 of the airbag 30 is anchored to the wall of the hook slot 50, preventing it from separating from the hook slot 50.

[0064] Furthermore, when the airbag 30 is inflated or deflated, the amount of inflation of the airbag 30 away from the unilateral mounting end is greater than that of the unilateral mounting end of the airbag 30. During this process, the air nozzle 301 of each airbag 30 is actuated by the airbag 30 to form a tighter pressure-contact fit with the edge side of the hole wall of the hook slot hole 50 close to the threaded hole 40, thereby reducing the possibility of the air nozzle 301 detaching from the hook slot hole 50 and further improving the installation stability of each airbag 30.

[0065] As shown in Figures 2, 3, 4, 7 and 8, the air nozzle 301 has an interface portion 3011 vertically fixed to the back of the airbag 30 and a hook portion 3012 vertically fixed to the end of the interface portion 3011, which extends into the hook slot hole 50. The interface portion 3011 of the air nozzle 301 is located in the hook slot hole 50, and the hook portion 3012 is located in the accommodating cavity 221 of the baffle plate 22 or the spacer cavity 111 of the upright block 11 and is arranged toward the unilateral mounting end of the airbag 30. ; The length of the interface part 3011 of the air nozzle 301 is greater than the axial length of the hook slot hole 50, and the cross-sectional area of ​​the interface part 3011 of the air nozzle 301 is smaller than the size of the hook slot hole 50; therefore, when the airbag 30 is inflated and deflated and swings, the air nozzle 301 of the airbag 30 can also swing synchronously relative to the wall of the hook slot hole 50, thereby increasing the swing angle range of each airbag 30, and being able to perform more sufficient kneading and massage on the acupuncture points of the human body, providing the user with a better massage experience.

[0066] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A leg and foot massage device, which is installed at the end of a massage chair seat, comprising a foot rest frame (10) having two foot grooves (101) for accommodating feet and a leg rest frame (20) located above the foot rest frame (10) and having a placement groove (201) for placing calves, characterized in that: The leg placement rack (20) comprises a vertical plate (21) and a baffle plate (22) located above the foot placement rack (10), wherein the baffle plate (22) and the vertical plate (21) are combined to form a placement groove (201) for placing the calf; the front ends of the two baffle plates (22) are bent inwardly toward opposite sides to form an arc-shaped curved shape that wraps around the outer side of the knee end of the calf, and the front side of the knee end of the calf of the human body placed in the placement groove (201) can be extended between the bent ends of the baffle plates (22) and the front ends of the vertical plates (21); An air bag (30) is arranged on the inner wall surface of the leg placement rack (20) or / and the foot placement rack (10), and a massage head (302) for massaging acupuncture points of the human body is provided on the surface of the air bag (30); the air bag (30) is installed on one side on the inner wall surface of the leg placement rack (20) or / and the foot placement rack (10).

2. A leg and foot massage device as claimed in claim 1, characterized in that: The airbag (30) is unilaterally mounted on the inner wall surface of the leg placement frame (20) or / and the foot placement frame (10) to form a single-layer airbag layer (303); when the single-layer airbag layer (303) is inflated or deflated, the inflation amount of the airbag (30) away from the unilateral mounting end is greater than that of the unilateral mounting end of the airbag (30), so that the airbag (30) actuates the massage head (302) to swing back and forth with the unilateral mounting end as the rotation center to massage the acupuncture points of the human body.

3. A leg and foot massage device as claimed in claim 1, characterized in that: The airbag (30) is a structure of at least two airbag layers (303), wherein only the airbag layer (303) of the airbag (30) close to the inner wall surface of the leg placement frame (20) or / and the foot placement frame (10) is unilaterally installed on the inner wall surface of the leg placement frame (20) or / and the foot placement frame (10); when the airbag (30) is inflated or deflated, the outer airbag layer (303) moves back and forth relative to the unilaterally installed airbag layer (303), so that the airbag (30) actuates the massage head (302) to reciprocate and massage the acupuncture points of the human body.

4. A leg and foot massage device as claimed in claim 1, characterized in that: The airbag (30) is a structure of at least two airbag layers (303), each airbag layer (303) of the airbag (30) is unilaterally mounted on the inner wall surface of the leg placement frame (20) or / and the foot placement frame (10), and when the multiple airbag layers (303) are inflated or deflated, the inflation amount of the airbag (30) away from the unilateral mounting end is greater than that of the unilateral mounting end of the airbag (30), so that the airbag (30) actuates the massage head (302) to swing back and forth with the unilateral mounting end as the rotation center to massage the acupuncture points of the human body.

5. A leg and foot massage device as claimed in claim 1, characterized in that: The airbag (30) comprises a foot airbag (32) arranged corresponding to the foot groove (101) for massaging acupuncture points on the human foot. A vertical block (11) for dividing the two foot grooves (101) is arranged in the middle of the foot placement frame (10); the foot airbag (32) is unilaterally mounted on two opposite sides of the vertical block (11).

6. A leg and foot massage device as claimed in claim 5, characterized in that: The massage head (302) on the foot airbag (32) is positioned directly opposite to the Sanyinjiao acupuncture point of the human body in the foot groove (101).

7. A leg and foot massage device as claimed in claim 1, characterized in that: The airbag (30) comprises a leg airbag (31) for massaging acupuncture points on a human leg and arranged corresponding to the placement groove (201). The leg airbag (31) is unilaterally mounted at the curved portion of the inner wall surface of the two baffle plates (22) to massage acupuncture points on the outer side of the human leg.

8. A leg and foot massage device as claimed in claim 5, characterized in that: The massage head (302) on the leg airbag (31) is arranged at a position directly facing the Zusanli acupoint of the human body in the placement groove (201).

9. A leg and foot massage device as claimed in claim 1, characterized in that: The air nozzle (301) on the back of the airbag (30) is fixedly connected to the middle position of the back of the airbag (30), and a hook slot hole (50) for the air nozzle (301) of the airbag (30) to extend into is opened on the inner wall surface of the leg placement frame (20) and / or the foot placement frame (10), and the air nozzle (301) accommodated in the hook slot hole (50) hooks and anchors the hole wall of the hook slot hole (50) close to the single-side installation end of the airbag (30), so as to increase the single-side installation area of ​​the airbag (30).

10. A leg and foot massage device as claimed in claim 9, characterized in that: The air nozzle (301) comprises an interface portion (3011) vertically fixed to the back side of the airbag (30) and a hook portion (3012) vertically fixed to the end of the interface portion (3011), and extends into the hook slot hole (50). The interface portion (3011) of the air nozzle (301) is located in the hook slot hole (50), and the hook portion (3012) is located in the accommodating cavity (221) of the baffle plate (22) or the spacing cavity (111) of the upright block (11) and is arranged toward the single-side mounting end of the airbag (30); the length of the interface portion (3011) of the air nozzle (301) is greater than the axial length of the hook slot hole (50), and the cross-sectional area of ​​the interface portion (3011) of the air nozzle (301) is smaller than the size of the opening of the hook slot hole (50).

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