A height-adjustable shock-absorbing pad

Abstract

The present invention belongs to the field of shock absorption technology, and in particular, a height-adjustable shock-absorbing pad, comprising a support table, the lower surface of the support table is provided with height adjustment devices evenly distributed in a rectangular array, the upper surface of the support table is fixedly connected with a main pad, the upper surface of the main pad is provided with a shock-absorbing device, wherein the height adjustment device is used to adjust the height of the support table, wherein the shock-absorbing device is used to reduce the impact force or vibration force on the main pad. The height-adjustable shock-absorbing pad, by providing a height adjustment device, controls the increase or decrease of the distance between the adjustment sleeve and the support seat when the adjustment sleeve rotates, supports the support table through a buffer spring, and the unloading arm cooperates with the articulated arm. With the impact force, the end of the articulated arm slides in the limiting slide groove, thereby achieving buffering of the support table when the support table is impacted, and adjusting the height of the support table according to actual needs.

Description

Technical Field

[0001] The invention relates to the technical field of shock absorption, and in particular to a shock absorption pad with adjustable height. Background Art

[0002] Many sports, such as floor exercise, artistic gymnastics, martial arts, Sanda, wrestling, knives, taekwondo, etc., require shock-absorbing sports mats. Shock-absorbing sports mats are mats used for sports, fitness, yoga and other activities to protect the body from the stimulation and pressure of hard floors. Sports mats provide a soft surface, making athletes feel more comfortable when contacting the ground, reducing discomfort and fatigue.

[0003] When the existing shock-absorbing pads are used for high jumping, the height of the shock-absorbing pads needs to be increased to ensure that the athletes can get better protection when they come into contact with the shock-absorbing pads when falling. When performing martial arts, free fighting, wrestling, kung fu, and taekwondo, the overall bouncing frequency of the shock-absorbing pads needs to be reduced, and only the pad surface of the shock-absorbing pads needs to provide comfortable support and cushioning. The height and shape are basically specific according to the applicable occasions, and the height of the shock-absorbing pads cannot be adjusted according to changes in the usage occasions, which reduces the scope of application of the shock-absorbing pads. Summary of the invention

[0004] Based on the technical problem that the existing shock-absorbing pad cannot adjust the height of the shock-absorbing pad according to the change of the use occasion, which reduces the application scope of the shock-absorbing pad, the present invention proposes a shock-absorbing pad with adjustable height.

[0005] The present invention proposes a height-adjustable shock-absorbing pad, which includes a support platform, the lower surface of which is provided with height adjustment devices evenly distributed in a rectangular array, the upper surface of which is fixedly connected with a main pad, and the upper surface of which is provided with a shock-absorbing device.

[0006] Wherein, the height adjustment device is used to adjust the height of the support platform.

[0007] Wherein, the shock absorbing device is used to reduce the impact force or vibration force on the main pad.

[0008] Preferably, the height adjustment device comprises a support leg fixed to the lower surface of the support platform, a connecting sleeve is threadedly mounted on the outer surface of the support leg, and an adjustment sleeve is mounted on the outer surface of the connecting sleeve via a bearing.

[0009] Through the above technical solution, the cooperation between the connecting sleeve and the supporting leg can realize height adjustment as the connecting sleeve rotates, and the bearing between the connecting sleeve and the adjusting sleeve ensures that the adjusting sleeve will not be affected during the rotation of the connecting sleeve.

[0010] Preferably, the outer surface of the lower end of the adjustment sleeve is provided with hinge interfaces evenly distributed in a circular array, the inner wall of the hinge interface is hingedly installed with a force unloading arm through a pin shaft, the lower surface of the support leg is fixedly installed with a matching column with a T-shaped cross-section, and the outer surface of the lower end of the matching column is movably sleeved with a support seat.

[0011] Through the above technical solution, the hinge interface is used to install the unloading arm, so that the unloading arm can be rotated at an angle, and the cooperation between the column and the support seat facilitates the adjustment of the distance between the support leg and the support seat.

[0012] Preferably, the outer surface of the upper end of the support seat is fixedly connected with articulated arms distributed in a circular array, and the two side surfaces of the lower end of the force unloading arm are provided with limiting slide grooves in a straight groove-shaped structure, and the inner wall of one end of the limiting slide groove is fixedly connected with a push spring, and the free end of the push spring is fixedly connected to the one side surface of the upper end of the articulated arm, and the upper end of the articulated arm is slidably inserted into the inner wall of the limiting slide groove.

[0013] Through the above technical solution, the cooperation between the articulated arm and the limiting slide groove further supports the support platform. In order to strengthen the cooperation between the articulated arm and the unloading arm, the push spring pushes the side of the articulated arm located in the limiting slide groove.

[0014] Preferably, a buffer spring movably sleeved on the outer surface of the matching column is fixedly connected to the upper surface of the support seat, and a buffer circular pad is fixedly connected to the lower surface of the support seat.

[0015] Through the above technical solution, the support seat and the supporting legs can be supported by the buffer spring, and the structure above the supporting legs can be buffered when impacted, and the bottom of the support seat can be buffered and protected by the buffer circular pad.

[0016] Preferably, the shock absorbing device comprises a track groove formed on the upper surface of the main pad, and the upper surface of the main pad is provided with shock absorbing cavities in a uniform array and interconnected with the inner wall of the track groove.

[0017] Through the above technical solution, the positional relationship between the track groove and the shock absorbing cavity is clarified.

[0018] Preferably, the inner wall of the shock-absorbing cavity is movably connected with a shock-absorbing sleeve, the inner top wall of each shock-absorbing sleeve is fixedly connected with a load-bearing plate, the inner wall of the main pad is fixedly connected with a support plate which is a long strip structure and evenly distributed in an array, the upper surface of the support plate located at the bottom of the shock-absorbing cavity is fixedly connected with a telescopic column, and the upper surface of the telescopic column is fixedly connected with a support spring fixedly connected to the lower surface of the load-bearing plate.

[0019] Through the above technical solution, the shock absorbing chamber is installed on the shock absorbing sleeve, the top hardness of the shock absorbing sleeve is increased by the load-bearing plate, the support plate is installed on the telescopic column and supports the telescopic column, and the support spring is used to support and buffer the telescopic column and the load-bearing plate.

[0020] Preferably, the upper surface of the main pad is fixedly connected to an outer pad, the lower surface of the outer pad is provided with an embedding groove, the inner wall of the embedding groove is fixedly connected to a buffer tube, and the outer surface of the buffer tube is fixedly connected to the upper surface of the shock absorbing sleeve.

[0021] Through the above technical solution, the buffer tube is installed in the embedding groove, and the buffer tube and the shock-absorbing sleeve are connected.

[0022] Preferably, the inner wall of the buffer tube is provided with a hydraulic port penetrating to the inner wall of the shock absorbing sleeve, the inner wall of the shock absorbing sleeve and the inner wall of the buffer tube are both filled with hydraulic oil, and a buffer airbag is fixedly sleeved on the outer surface of the outer pad.

[0023] Through the above technical solution, the buffer tube and the inner wall of the shock-absorbing sleeve can be connected through the hydraulic port. After the outer pad is impacted, the telescopic column moves in the shock-absorbing sleeve, and then the hydraulic oil in the shock-absorbing sleeve is sucked or discharged through the buffer tube.

[0024] Preferably, a reinforcing pad is bonded to the upper surface of the outer pad by means of a mother-and-child tape, and a plurality of rows of airbag strips evenly distributed in a linear array are fixedly connected to the upper surface of the reinforcing pad. The airbag strips are composed of a plurality of airbag packages, and the inner walls of every two adjacent airbag packages are interconnected by a connecting hose.

[0025] Through the above technical solution, according to specific usage requirements, the cushioning performance of the outer pad is increased, and the impact force is cushioned by the flow of gas between the airbag packages in the airbag strips, thereby increasing applicability.

[0026] The beneficial effects of the present invention are:

[0027] 1. By setting a height adjustment device, the distance between the adjustment sleeve and the support seat is increased or decreased when the adjustment sleeve rotates, and the support platform is supported by the buffer spring. The force unloading arm cooperates with the articulated arm. With the impact force, the end of the articulated arm slides in the limiting slide groove, so that the support platform is buffered when the support platform is impacted, and the height of the support platform can be adjusted according to actual needs.

[0028] 2. By setting up a shock-absorbing device, the impact force is transmitted to the outer pad. After the outer pad is under pressure, it is squeezed downward, causing the shock-absorbing sleeve to move downward. The support of the support plate enables the telescopic column to move in the shock-absorbing sleeve. The hydraulic oil in the shock-absorbing sleeve flows into the buffer tube. During the flow of the hydraulic oil, the shock-absorbing and shock-absorbing effects are achieved. The evenly distributed shock-absorbing sleeves and buffer tubes connect all the shock-absorbing sleeves, effectively dispersing the impact force and improving the overall shock-absorbing performance of the shock-absorbing pad.

[0029] 3. By providing a reinforcing pad, the upper surface of the shock-absorbing pad can be converted between a flat motion surface and a high-elastic buffer surface, thereby providing the user with a highly elastic planar motion area and a high-elastic buffer area. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of a height-adjustable shock-absorbing pad proposed by the present invention;

[0031] Figure 2 A three-dimensional diagram of the airbag strip structure of a height-adjustable shock-absorbing pad proposed by the present invention;

[0032] Figure 3 A three-dimensional diagram of a support platform structure of a height-adjustable shock-absorbing pad proposed by the present invention;

[0033] Figure 4 A three-dimensional diagram of the main pad structure of a height-adjustable shock-absorbing pad proposed by the present invention;

[0034] Figure 5 A three-dimensional diagram of the shock-absorbing sleeve structure of a height-adjustable shock-absorbing pad proposed by the present invention;

[0035] Figure 6 A three-dimensional diagram of the telescopic column structure of a height-adjustable shock-absorbing pad proposed by the present invention;

[0036] Figure 7 A three-dimensional diagram of the leg structure of a height-adjustable shock-absorbing pad proposed by the present invention;

[0037] Figure 8 A three-dimensional diagram of the matching column structure of a height-adjustable shock-absorbing pad proposed by the present invention;

[0038] Fig. 9 A height-adjustable shock-absorbing pad proposed by the present invention Figure 4 A magnified view of the structure in the middle.

[0039] In the figure: 1. support platform; 2. main pad; 3. support leg; 31. connecting sleeve; 32. adjusting sleeve; 33. hinge interface; 34. unloading arm; 35. matching column; 36. support seat; 37. articulated arm; 38. limiting slide groove; 39. pushing spring; 310. buffer spring; 311. buffer circular pad; 4. track groove; 41. shock absorbing chamber; 42. shock absorbing sleeve; 43. load-bearing plate; 44. support plate; 45. telescopic column; 46. support spring; 47. outer pad; 48. embedded groove; 49. buffer tube; 410. hydraulic port; 411. buffer airbag; 412. reinforcement pad; 413. airbag strip; 414. connecting hose. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0041] Reference Figure 1-Figure 9 A height-adjustable shock-absorbing pad comprises a support platform 1, the lower surface of the support platform 1 is provided with height adjustment devices evenly distributed in a rectangular array, the upper surface of the support platform 1 is fixedly connected with a main pad 2, and the upper surface of the main pad 2 is provided with a shock-absorbing device.

[0042] like Figure 1 , Figure 3-Figure 4 and Figure 7-Figure 8 As shown, the height adjustment device is used to adjust the height of the support platform 1, and the height adjustment device includes a support leg 3 fixed on the lower surface of the support platform 1. In order to adjust the distance between the support leg 3 and the lower structure, a connecting sleeve 31 is threadedly installed on the outer surface of the support leg 3. Furthermore, an adjusting sleeve 32 is installed on the outer surface of the connecting sleeve 31 through a bearing. The connection of the bearing ensures that the connecting sleeve 31 will not affect the adjusting sleeve 32 during rotation. The cooperation between the connecting sleeve 31 and the support leg 3 can achieve height adjustment as the connecting sleeve 31 rotates. The bearing between the connecting sleeve 31 and the adjusting sleeve 32 ensures that the connecting sleeve 31 will not affect the adjusting sleeve 32 during rotation.

[0043] In order to install the unloading arm 34, a hinge interface 33 evenly distributed in a circular array is opened on the outer surface of the lower end of the adjustment sleeve 32. Furthermore, the unloading arm 34 is hingedly installed on the inner wall of the hinge interface 33 through a pin shaft, so as to facilitate the angular deflection of the unloading arm 34. In order to facilitate the cooperation between the support leg 3 and the lower structure, a matching column 35 with a T-shaped cross-section is fixedly installed on the lower surface of the support leg 3. Furthermore, in order to cooperate with the matching column 35 and support the support platform 1, a support seat 36 is movably sleeved on the outer surface of the lower end of the matching column 35. The unloading arm 34 is installed through the hinge interface 33, so that the unloading arm 34 can be rotated at an angle, and the cooperation between the matching column 35 and the support seat 36 facilitates the adjustment of the distance between the support leg 3 and the support seat 36.

[0044] In order to relieve the impact force on the support leg 3, an articulated arm 37 distributed in a ring array is fixedly connected to the outer surface of the upper end of the support seat 36. Furthermore, in order to make the unloading arm 34 cooperate with the articulated arm 37, a limiting slide groove 38 with a straight groove-shaped structure is opened on the two side surfaces of the lower end of the unloading arm 34. Furthermore, in order to increase the unloading effect between the articulated arm 37 and the unloading arm 34, a push spring 39 is fixedly connected to the inner wall of one end of the limiting slide groove 38, so that the free end of the push spring 39 is fixedly connected to one side surface of the upper end of the articulated arm 37, and the upper end of the articulated arm 37 is slidably inserted into the inner wall of the limiting slide groove 38. The cooperation between the articulated arm 37 and the limiting slide groove 38 further supports the support platform 1. In order to strengthen the cooperation between the articulated arm 37 and the unloading arm 34, the push spring 39 pushes the side of the articulated arm 37 located in the limiting slide groove 38.

[0045] The upper surface of the support seat 36 is fixedly connected with a buffer spring 310 which is movably sleeved on the outer surface of the matching column 35, and the lower surface of the support seat 36 is fixedly connected with a buffer circular pad 311. The buffer spring 310 can support the support seat 36 and the support leg 3, and provide buffering when the structure above the support leg 3 is impacted, and the buffer circular pad 311 can provide buffering and protection for the bottom of the support seat 36.

[0046] By setting up a height adjustment device, the distance between the adjustment sleeve 32 and the support seat 36 is controlled to increase or decrease when it rotates, and the support platform 1 is supported by the buffer spring 310. The force unloading arm 34 cooperates with the articulated arm 37. With the impact force, the end of the articulated arm 37 slides in the limiting slide groove 38, so that the support platform 1 is buffered when the support platform 1 is impacted, and the height of the support platform 1 can be adjusted according to actual needs.

[0047] like Figure 1-Figure 6 and Fig. 9As shown, the shock absorbing device is used to reduce the impact force or vibration force on the main pad 2. The shock absorbing device includes a track groove 4 opened on the upper surface of the main pad 2. In order to enable the structure in the track groove 4 to interact with the structure in the shock absorbing cavity 41, a uniform array of shock absorbing cavities 41 are opened on the upper surface of the main pad 2 and are interconnected with the inner wall of the track groove 4. The positional relationship between the track groove 4 and the shock absorbing cavity 41 is clarified.

[0048] Furthermore, in order to dampen the impact force on the main pad 2, a shock-absorbing sleeve 42 is movably sleeved on the inner wall of the shock-absorbing cavity 41, and the inner top wall of each shock-absorbing sleeve 42 is fixedly connected to a load-bearing plate 43. In order to support the structure added to the main pad 2 and facilitate coordination with other structures, a support plate 44 in a long strip structure and evenly distributed in an array is fixedly connected to the inner wall of the main pad 2, and a telescopic column 45 is fixedly connected to the upper surface of the support plate 44 located at the bottom of the shock-absorbing cavity 41. In order to reset or rebound the shock-absorbing sleeve 42, a support spring 46 fixedly connected to the lower surface of the load-bearing plate 43 is fixedly connected to the upper surface of the telescopic column 45. The shock-absorbing cavity 41 installs the shock-absorbing sleeve 42, and the load-bearing plate 43 is used to increase the top hardness of the shock-absorbing sleeve 42. The support plate 44 installs and supports the telescopic column 45, and the support spring 46 supports and buffers the telescopic column 45 and the load-bearing plate 43.

[0049] Furthermore, in order to install the buffer tube 49, an outer pad 47 is fixedly connected to the upper surface of the main pad 2, and an embedding groove 48 is opened on the lower surface of the outer pad 47, and a buffer tube 49 is fixedly connected to the inner wall of the embedding groove 48. The buffer tube 49 is installed through the embedding groove 48. In order to dock the buffer tube 49 with the shock-absorbing sleeve 42, the outer surface of the buffer tube 49 is fixedly connected to the upper surface of the shock-absorbing sleeve 42, so that the embedding groove 48 is used to install the buffer tube 49, and the buffer tube 49 and the shock-absorbing sleeve 42 are docked. In order to distribute the impact force received by the main pad 2 A hydraulic port 410 is provided on the inner wall of the buffer tube 49 and penetrates to the inner wall of the shock absorbing sleeve 42, and the inner walls of the shock absorbing sleeve 42 and the buffer tube 49 are filled with hydraulic oil. Furthermore, in order to reduce shock or buffer the edge of the outer pad 47, a buffer airbag 411 is fixedly sleeved on the outer surface of the outer pad 47, and the buffer tube 49 can be connected to the inner wall of the shock absorbing sleeve 42 through the hydraulic port 410. After the outer pad 47 is impacted, the telescopic column 45 moves in the shock absorbing sleeve 42, and then the hydraulic oil in the shock absorbing sleeve 42 is sucked in or discharged through the buffer tube 49.

[0050] By setting up a shock-absorbing device, the impact force is transmitted to the outer pad 47. After the outer pad 47 is under pressure, it is squeezed downward, so that the shock-absorbing sleeve 42 moves downward. The support of the support plate 44 enables the telescopic column 45 to move in the shock-absorbing sleeve 42. The hydraulic oil in the shock-absorbing sleeve 42 flows into the buffer tube 49. The shock-absorbing and shock-absorbing effects are achieved during the flow of the hydraulic oil. The evenly distributed shock-absorbing sleeves 42 and the buffer tubes 49 connect all the shock-absorbing sleeves 42, effectively disperse the impact force, and improve the overall shock-absorbing performance of the shock-absorbing pad.

[0051] In order to make the shock-absorbing pad suitable for a variety of situations, a reinforcing pad 412 is adhered to the upper surface of the outer pad 47 by a mother-and-child tape, and a plurality of rows of airbag strips 413 evenly distributed in a linear array are fixedly connected to the upper surface of the reinforcing pad 412, and the airbag strips 413 are composed of a plurality of airbag packages, and the inner walls of every two adjacent airbag packages are interconnected by a connecting hose 414. According to specific usage requirements, the cushioning performance of the outer pad 47 is increased, and the impact force is cushioned by the flow of gas between the airbag packages in the airbag strips 413, thereby increasing applicability.

[0052] By providing the reinforcing pad 412, the upper surface of the shock-absorbing pad can be converted between a flat motion surface and a high-elastic buffer surface, thereby providing the user with a planar motion area with high elasticity and a high-elastic buffer area.

[0053] Working principle: When high jumping is required, the reinforcement pad 412 is installed, and the airbag strip 413 provides sufficient cushioning effect. When the airbag strip 413 is subjected to a sudden impact, the gas in the stressed airbag bag will be transferred to the airbag bags on both sides through the connecting hose 414. Then, the remaining impact force is transmitted to the outer pad 47. After the outer pad 47 is subjected to pressure, it is squeezed downward, so that the shock absorbing sleeve 42 moves downward, so that the telescopic column 45 moves in the shock absorbing sleeve 42, and the hydraulic oil in the shock absorbing sleeve 42 flows into the buffer tube 49, and the shock absorbing and shock absorption effects are achieved during the flow of the hydraulic oil.

[0054] When the height of the support platform 1 needs to be adjusted, the connecting sleeve 31 is rotated to increase or decrease the distance between the adjustment sleeve 32 and the support seat 36, and the support platform 1 is supported by the buffer spring 310. The force unloading arm 34 cooperates with the articulated arm 37, and the end of the articulated arm 37 slides in the limiting slide groove 38 with the impact force, so that the support platform 1 is buffered when the support platform 1 is impacted;

[0055] When high-elastic exercise is not required, the reinforcing pad 412 is removed from the outer pad 47, so that the upper surface of the shock-absorbing pad becomes a flat exercise surface, thereby providing the user with a planar exercise area with high elasticity.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A height-adjustable shock-absorbing pad, characterized in that: It comprises a support platform (1), the lower surface of the support platform (1) being provided with height adjustment devices evenly distributed in a rectangular array, the upper surface of the support platform (1) being fixedly connected with a main pad (2), the upper surface of the main pad (2) being provided with a shock absorbing device; The height adjustment device is used to adjust the height of the support platform (1), and comprises a support leg (3) fixed to the lower surface of the support platform (1); a connecting sleeve (31) is threadedly mounted on the outer surface of the support leg (3); an adjusting sleeve (32) is mounted on the outer surface of the connecting sleeve (31) via a bearing; a hinge interface (33) evenly distributed in a circular array is formed on the outer surface of the lower end of the adjusting sleeve (32); a force unloading arm (34) is hingedly mounted on the inner wall of the hinge interface (33) via a pin shaft; and a cross-sectional T-shaped structure is fixedly mounted on the lower surface of the support leg (3). A matching column (35), wherein the outer surface of the lower end of the matching column (35) is movably sleeved with a support seat (36), and the outer surface of the upper end of the support seat (36) is fixedly connected with hinged arms (37) distributed in a ring array, and the two side surfaces of the lower end of the unloading arm (34) are provided with limiting slide grooves (38) in a straight slot-shaped structure, and the inner wall of one end of the limiting slide groove (38) is fixedly connected with a push spring (39), and the free end of the push spring (39) is fixedly connected to a side surface of the upper end of the hinged arm (37), and the upper end of the hinged arm (37) is slidably plugged into the inner wall of the limiting slide groove (38); The shock absorbing device is used to reduce the impact force or vibration force on the main pad (2), and the shock absorbing device comprises a track groove (4) provided on the upper surface of the main pad (2), the upper surface of the main pad (2) is provided with a uniform array of shock absorbing cavities (41) which are interconnected with the inner wall of the track groove (4), the inner wall of the shock absorbing cavity (41) is movably sleeved with a shock absorbing sleeve (42), the inner top wall of each shock absorbing sleeve (42) is fixedly connected to a load-bearing plate (43), and the inner wall of the main pad (2) is fixedly connected to a support plate having a long strip structure and uniformly distributed in an array. (44), the upper surface of the support plate (44) located at the bottom of the shock absorbing cavity (41) is fixedly connected to a telescopic column (45), the upper surface of the telescopic column (45) is fixedly connected to a support spring (46) fixedly connected to the lower surface of the load-bearing plate (43), the upper surface of the main pad (2) is fixedly connected to an outer pad (47), the lower surface of the outer pad (47) is provided with an embedding groove (48), the inner wall of the embedding groove (48) is fixedly connected to a buffer tube (49), and the outer surface of the buffer tube (49) is fixedly connected to the upper surface of the shock absorbing sleeve (42).

2. A height-adjustable shock-absorbing pad according to claim 1, characterized in that: A buffer spring (310) movably sleeved on the outer surface of the matching column (35) is fixedly connected to the upper surface of the support seat (36), and a buffer circular pad (311) is fixedly connected to the lower surface of the support seat (36).

3. A height-adjustable shock-absorbing pad according to claim 2, characterized in that: The inner wall of the buffer tube (49) is provided with a hydraulic port (410) penetrating to the inner wall of the shock absorbing sleeve (42); the inner wall of the shock absorbing sleeve (42) and the inner wall of the buffer tube (49) are both filled with hydraulic oil; and a buffer air bag (411) is fixedly sleeved on the outer surface of the outer pad (47).

4. The height-adjustable shock-absorbing pad according to claim 3, characterized in that: The upper surface of the outer layer pad (47) is bonded with a reinforcing pad (412) via a mother-and-child adhesive tape, and the upper surface of the reinforcing pad (412) is fixedly connected to a plurality of rows of airbag strips (413) evenly distributed in a linear array, wherein the airbag strips (413) are composed of a plurality of airbag packages, and the inner walls of every two adjacent airbag packages are interconnected via a connecting hose (414).

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