Multifunctional vehicle-mounted mattress

Abstract

The utility model provides a multifunctional vehicle-mounted mattress which comprises a mattress body and further comprises a trunk cushion and a back row seat back cushion, the trunk cushion comprises a trunk cushion body and a first connecting seat, and the first connecting seat is fixedly arranged on the side wall of one side of the trunk cushion body. The air cushion and the air spring are inflated, and the inflatable cushion I, the inflatable cushion II and the inflatable cushion III are inflated, so that the inclination of the mattress can be well adjusted as required, the mattress is convenient to use, and the whole mattress is comfortable to use; by deflating the air cushion, the air spring, the inflatable cushion I, the inflatable cushion II and the inflatable cushion III, the air cushion, the air spring, the inflatable cushion I, the inflatable cushion II and the inflatable cushion III can be hidden under the comfortable layer after deflation, so that the mattress can be better stored, and the situation that the mattress occupies excessive space in an automobile is better avoided; and the effect of one pad with two purposes is realized.

Description

Technical Field

[0001] This utility model relates to the field of vehicle mattress technology, and in particular to a multifunctional vehicle mattress. Background Technology

[0002] A car mattress is a soft bed used inside a car, designed to provide a comfortable resting environment that is easy to carry and use. It is typically designed to be placed on the back seat of a car, allowing users to use it during long journeys or when they need to rest, thus reducing travel fatigue.

[0003] Nowadays, inflatable car mattresses are gradually becoming standard equipment for outdoor camping. However, current inflatable car mattresses are cumbersome to use. They need to be taken out of the storage bag, laid out in the desired location, inflated, and then deflated before storage. This process takes up considerable space and affects the tidiness of the car interior. Therefore, how to make the mattress easier to use and avoid taking up too much space in the car interior when storing it are important issues that need to be addressed in the design of multifunctional car mattresses. Utility Model Content

[0004] This invention provides a multifunctional car mattress to address the problems of inconvenient use and space-consuming storage.

[0005] This utility model solves the above-mentioned technical problems through the following technical solutions:

[0006] This utility model provides a multifunctional car mattress, including a mattress and further comprising: a trunk mat and a rear seat backrest cushion; the trunk mat includes a main body and a connecting seat 1, the connecting seat 1 being fixedly mounted on one side wall of the main body; the rear seat backrest cushion includes a backrest cushion main body, a connecting seat 2 and a connecting seat 3, the connecting seat 2 and the connecting seat 3 being fixedly mounted on adjacent side walls of the backrest cushion main body; the side wall of the backrest cushion main body is provided with a folding groove; when the rear seats are normally upright, the trunk mat and the rear seat backrest cushion are in a deflated state; the deflated trunk mat is laid inside the trunk and used as a regular trunk mat; the deflated rear seat backrest cushion is attached to the back of the rear seats and used as a regular rear seat backrest cushion; when the rear seats are folded down, both the trunk mat and the rear seat backrest cushion are in an inflatable state, both on the same plane, forming a single inflatable car mattress for use as a mattress.

[0007] Preferably, both the main body of the cushion and the main body of the backrest cushion are composed of an adjustment layer, a comfort layer and an air cushion layer, with an air cushion layer fixedly disposed at the bottom of the comfort layer and an adjustment layer fixedly disposed at the bottom of the air cushion layer.

[0008] In this technical solution, the air cushion layer, when inflated, serves as support for the entire mattress; the adjustment layer, when inflated, allows for adjustment of the mattress's angle; and when deflated, the air cushion layer and adjustment layer are completely hidden beneath the comfort layer. The trunk mat's main body is shaped like a standard vehicle trunk mat, and the backrest mat's main body is shaped like the back of a standard vehicle rear seat. The backrest mat is placed against the back of a standard vehicle rear seat. The folding grooves on the backrest mat are designed to accommodate "2+1" type rear seats. When folding down the two seats on the left side or a single seat on the right side, the backrest mat can be folded up along the grooves as needed. The folded backrest mat folds down smoothly with the individual rear seats. In the deflated state, it serves as a car trunk mat or fits against the back of the rear seat; in the inflated state, it provides a comfortable sleeping experience for the user.

[0009] Preferably, the adjustment layer includes an air cushion one, an air cushion two, an air cushion three, a vent one, and a vent two. The air cushion one, air cushion two, and air cushion three are fixedly connected from bottom to top. The side wall where the air cushion three and the air cushion two are connected is provided with a vent one, and the side wall where the air cushion two and the air cushion one are connected is provided with a vent two.

[0010] In this technical solution, by inflating air pad one, air pad two, and air pad three, the expansion degree of the left end of air pad one, air pad two, and air pad three is greater than that of the right end during inflation. This allows for better adjustment of the mattress tilt as needed, enabling the mattress to be adjusted to a horizontal state at different inclines. This allows people to lie on the mattress without having to resist the incline, thus relaxing their body and mind, relieving muscle soreness, reducing the burden on the heart, and increasing the rest effect.

[0011] Preferably, the air cushion layer includes an air cushion, an air spring, and an isolation layer. The isolation layer is fixedly connected to the bottom sidewall of the air cushion, and air springs are fixedly arranged at equal intervals on the inner sidewall of the air cushion. Ventilation holes are added to the bottom of the air springs to communicate with the isolation layer.

[0012] In this technical solution, by inflating the air mattress and air springs, different air pressures are provided to the bed frame and air springs, thereby allowing the air mattress to adjust to various sleeping sensations.

[0013] Preferably, the comfort layer includes a filling layer and resistance wires, the filling layer is fixedly disposed on the top of the air cushion, and the resistance wires are fixedly disposed at equal intervals in the middle of the filling layer.

[0014] In this technical solution, the resistance wire is a heating resistance wire to realize the mattress heating function.

[0015] Preferably, the connecting seat is fixedly provided with an adjusting layer air valve female head, an air spring air valve female head, an air cushion air valve female head and a power interface female head. The adjusting layer air valve female head communicates with the air cushion on the main body of the box mat, the air spring air valve female head communicates with the isolation layer on the main body of the box mat, and the air cushion air valve female head communicates with the air cushion on the main body of the box mat.

[0016] In this technical solution, the air cushion 1, air cushion 2 and air cushion 3 are inflated by adjusting the first air valve female head, the air spring is inflated by the first air spring valve female head, and the air cushion is inflated by the first air cushion valve female head.

[0017] Preferably, the second connector is fixedly provided with a male connector for adjusting the air valve, a male connector for the air spring valve, a male connector for the air cushion valve, and a male connector for the power interface; the third connector is fixedly provided with a second female connector for adjusting the air valve, a second female connector for the air spring valve, a second female connector for the air cushion valve, and a second female connector for the power interface.

[0018] Preferably, the male connector of the regulating layer air valve and the female connector of the regulating layer air valve cooperate with each other, the male connector of the air spring air valve and the female connector of the air spring air valve cooperate with each other, the male connector of the air cushion air valve and the female connector of the air cushion air valve cooperate with each other, and the male connector of the power interface and the female connector of the power interface cooperate with each other.

[0019] In this technical solution, the male connector of the regulating layer air valve is plugged into the female connector of the regulating layer air valve, the male connector of the air spring air valve is plugged into the female connector of the air spring air valve, the male connector of the air cushion air valve is plugged into the female connector of the air cushion air valve to provide air pressure for the trunk mat, and the male connector of the power interface is plugged into the female connector of the power interface to supply power to the trunk mat.

[0020] Preferably, the second adjusting layer air valve head is connected to the first inflatable cushion on the backrest cushion body, the second air spring air valve head is connected to the isolation layer on the backrest cushion body, and the second air cushion air valve head is connected to the air cushion on the backrest cushion body.

[0021] In this technical solution, the second female connector of the adjustment layer air valve, the second female connector of the air spring air valve, and the second female connector of the air cushion air valve are all connected to an external air pump to provide air pressure for the entire air mattress system. The second female connector of the power interface is connected to an external power source to supply power to the entire mattress system.

[0022] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0023] The positive and progressive effects of this utility model are as follows:

[0024] 1. By inflating the air mattress and air springs, different air pressures are provided to the bed frame and air springs, allowing the air mattress to adjust to various sleeping sensations. By inflating air mattress one, air mattress two, and air mattress three, the tilt of the mattress can be adjusted as needed, and different inclines can be adjusted to a horizontal state. This allows people to lie on the mattress without having to resist the incline, relax their body and mind, relieve muscle soreness, reduce the burden on the heart, and increase the rest effect. This makes the mattress convenient to use and more comfortable to use.

[0025] 2. By deflating the air cushion, air spring, air cushion one, air cushion two, and air cushion three, the deflated air cushion, air spring, air cushion one, air cushion two, and air cushion three can be hidden under the comfort layer. The deflated trunk mat can be placed in the trunk of the car and used as a mat. The deflated rear seat back cushion can be placed on the back of the rear seat of the car, which is not only neat and beautiful, but also convenient for storing the mattress. At the same time, it avoids the mattress taking up too much space in the car's interior, achieving the effect of one mat serving two purposes. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0027] Figure 2 This is a top view of the internal structure of the trunk mat of this utility model.

[0028] Figure 3 This is a top view schematic diagram of the internal structure of the rear seat back cushion of this utility model.

[0029] Figure 4 This is a side view of the internal structure of the trunk mat of this utility model.

[0030] Figure 5 This is a schematic diagram of the three-dimensional structure of the rear seat backrest cushion of this utility model.

[0031] Figure 6 This is a side view of the internal structure of the integrated trunk mat of this utility model when it is stored.

[0032] Figure 7 This is a schematic diagram of the internal structure of the overall adjustment layer of this utility model.

[0033] Explanation of reference numerals in the attached figures

[0034] 1. Mattress; 101. Trunk Mat; 1011. Trunk Mat Main Body; 1012. Connecting Seat 1; 1111. Adjustable Layer Air Valve Female Connector 1; 1112. Air Spring Air Valve Female Connector 1; 1113. Air Cushion Air Valve Female Connector 1; 1016. Power Interface Female Connector 1; 102. Rear Seat Backrest Cushion; 1021. Backrest Cushion Main Body; 1022. Connecting Seat 2; 1023. Connecting Seat 3; 1121. Adjustable Layer Air Valve Male Connector; 1122. Air Spring Air Valve Male Connector; 1123. Air Cushion Air Valve Male Connector; 112 4. Power interface male connector; 1125. Adjustment layer air valve female connector 2; 1126. Air spring air valve female connector 2; 1127. Air cushion air valve female connector 2; 1128. Power interface female connector 2; 2. Adjustment layer; 201. Inflatable cushion 1; 202. Inflatable cushion 2; 203. Inflatable cushion 3; 204. Vent hole 1; 205. Vent hole 2; 3. Folding groove; 4. Comfort layer; 401. Filling layer; 402. Resistance wire; 5. Air cushion layer; 501. Air cushion; 502. Air spring; 503. Insulation layer. Detailed Implementation

[0035] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0036] like Figure 1-7 As shown, a multifunctional car mattress includes a mattress 1, and further includes: the mattress 1 includes a trunk mat 101 and a rear seat backrest mat 102; the trunk mat 101 includes a trunk mat body 1011 and a connecting seat 1012, the connecting seat 1012 being fixedly disposed on one side wall of the trunk mat body 1011; the rear seat backrest mat 102 includes a backrest mat body 1021, a connecting seat 2 1022, and a connecting seat 3 1023, the connecting seat 2 1022 and the connecting seat 3 1023 being respectively fixedly disposed on the adjacent side walls of the backrest mat body 1021. The backrest cushion body 1021 has a folding groove 3 on its side wall. When the rear seats are normally upright, the trunk mat 101 and the rear seat backrest cushion 102 are in a deflated state. After the trunk mat 101 is deflated, it is laid in the trunk and used as a regular trunk mat. After the rear seats are deflated, the rear seat backrest cushion 102 is attached to the back of the rear seats and used as a regular rear seat backrest cushion. When the rear seats are folded down, both the trunk mat 101 and the rear seat backrest cushion 102 are in an inflatable state. They are on the same plane and form a whole inflatable car mattress for use as a mattress.

[0037] Both the main body 1011 of the box cushion and the main body 1021 of the backrest cushion are composed of an adjustment layer 2, a comfort layer 4 and an air cushion layer 5. The bottom of the comfort layer 4 is fixedly provided with the air cushion layer 5, and the bottom of the air cushion layer 5 is fixedly provided with the adjustment layer 2.

[0038] When inflated, the air cushion layer 5 provides support for the entire mattress. When inflated, the adjustment layer 2 allows for angle adjustment of the entire mattress. When deflated, the air cushion layer 5 and adjustment layer 2 are completely hidden under the comfort layer 4. The trunk mat body 1011 is shaped like a regular car trunk mat, and the backrest mat body 1021 is shaped like the back of a regular car rear seat. The backrest mat body 1021 is placed against the back of a regular car rear seat. The folding groove 3 on the backrest mat body 1021 is designed to accommodate "2+1" type car rear seats. When folding down the two seats on the left side or a single seat on the right side, the backrest mat body 1021 can be folded up along the folding groove 3 as needed. The folded backrest mat body 1021 can be folded down well with the individual rear seats. When deflated, it serves as a car trunk mat or is placed against the back of the rear seat. When inflated, it provides a comfortable sleeping experience for the user.

[0039] The adjustment layer 2 includes an air cushion 1 201, an air cushion 202, an air cushion 3 203, a vent 1 204, and a vent 2 205. The air cushion 1 201, air cushion 202, and air cushion 3 203 are fixedly connected from bottom to top. The side wall where the air cushion 3 203 is connected to the air cushion 501 is provided with a vent 1 204, and the side wall where the air cushion 2 202 is connected to the air cushion 1 201 is provided with a vent 2 205.

[0040] By inflating air pad 1 (201), air pad 2 (202), and air pad 3 (203), the expansion degree of the left end of each air pad 1 (201), air pad 2 (202), and air pad 3 (203) is greater than that of the right end. This allows for better adjustment of the tilt of mattress 1 as needed, enabling different inclines to be adjusted to a horizontal state. When lying on mattress 1, one does not need to resist the incline, allowing for relaxation of the body and mind, relief of muscle soreness, reduction of cardiac burden, and enhanced rest.

[0041] The air cushion layer 5 includes an air cushion 501, an air spring 502, and an isolation layer 503. The isolation layer 503 is fixedly connected to the bottom side wall of the air cushion 501. Air springs 502 are fixedly arranged at equal intervals on the inner side wall of the air cushion 501. Ventilation holes are added to the bottom of the air springs 502 to communicate with the isolation layer 503.

[0042] By inflating the air mattress 501 and the air spring 502, different air pressures are provided to the bed frame and the air spring 502, thereby allowing the air mattress 501 to be adjusted to provide various sleeping sensations.

[0043] The comfort layer 4 includes a filling layer 401 and a resistance wire 402. The filling layer 401 is fixedly disposed on the top of the air cushion 501, and the resistance wire 402 is fixedly disposed at equal intervals in the middle of the filling layer 401.

[0044] Resistance wire 402 is a heating resistance wire that enables the mattress to heat up.

[0045] The connecting seat 1012 is fixedly equipped with an adjusting layer air valve female head 1111, an air spring air valve female head 1112, an air cushion air valve female head 1113, and a power interface female head 1016. The adjusting layer air valve female head 1111 communicates with the inflatable cushion 201 on the box mat body 1011, the air spring air valve female head 1112 communicates with the isolation layer 503 on the box mat body 1011, and the air cushion air valve female head 1113 communicates with the air cushion 501 on the box mat body 1011.

[0046] Inflate air cushion 201, air cushion 202 and air cushion 203 by adjusting the air valve head 1111, inflate air spring 502 by adjusting the air spring valve head 1112, and inflate air cushion 501 by adjusting the air cushion valve head 1113.

[0047] The second connector 1022 is fixedly provided with an adjustment layer air valve male connector 1121, an air spring air valve male connector 1122, an air cushion air valve male connector 1123 and a power interface male connector 1124. The third connector 1023 is fixedly provided with an adjustment layer air valve female connector 1125, an air spring air valve female connector 1126, an air cushion air valve female connector 1127 and a power interface female connector 1128.

[0048] The male connector 1121 of the regulating layer air valve and the female connector 1111 of the regulating layer air valve cooperate with each other; the male connector 1122 of the air spring air valve and the female connector 1112 of the air spring air valve cooperate with each other; the male connector 1123 of the air cushion air valve and the female connector 1113 of the air cushion air valve cooperate with each other; and the male connector 1124 of the power interface cooperates with the female connector 1016 of the power interface.

[0049] Connect the male connector 1121 of the regulating layer 2 air valve to the female connector 1111 of the regulating layer 2 air valve, connect the male connector 1122 of the air spring 502 air valve to the female connector 1112 of the air spring 502 air valve, connect the male connector 1123 of the air cushion 501 air valve to the female connector 1113 of the air cushion 501 to provide air pressure for the trunk mat 101, and connect the male connector 1124 of the power interface to the female connector 1016 of the power interface to supply power to the trunk mat 101.

[0050] The second adjusting layer air valve head 1125 is connected to the first inflatable cushion 201 on the backrest cushion body 1021, the second air spring air valve head 1126 is connected to the isolation layer 2 on the backrest cushion body 1021, and the second air cushion air valve head 1127 is connected to the air cushion 501 on the backrest cushion body 1021.

[0051] The adjustment layer 2 air valve female connector 1125, the air spring 502 air valve female connector 1126, and the air cushion 501 air valve female connector 1127 are all connected to the external air pump to provide air pressure for the entire air mattress 1 system. The power interface female connector 1128 is connected to the external power source to provide power to the entire mattress 1 system.

[0052] In use, all electrical components mentioned in this application are externally connected to a power supply and control switch. When in use, after folding down the entire rear seat of the car, the trunk mat 101 and the rear seat back mat 102 are adjusted. The male connector 1121 of the adjustment layer 2 air valve is inserted into the female connector 1111 of the adjustment layer 2 air valve, the male connector 1122 of the air spring 502 air valve is inserted into the female connector 1112 of the air spring 502 air valve, and the male connector 1123 of the air cushion 501 air valve is inserted into the air cushion 502 air cushion. On the female connector 1113 of the air valve, air pressure is provided to the trunk mat 101. The male connector 1124 of the power interface is plugged into the female connector 1016 of the power interface to provide power to the trunk mat 101. The female connector 1125 of the adjustment layer 2 air valve, the female connector 1126 of the air spring 502 air valve, and the female connector 1127 of the air cushion 501 air valve are all connected to the external air pump to provide air pressure to the entire air mattress 1 system. The female connector 1128 of the power interface is connected to the external power source to provide power to the entire mattress 1 system.

[0053] By inflating the air cushion 501 and the air spring 502, different air pressures are provided to the bed frame and the air spring 502, allowing the air cushion 501 to adjust to various sleeping sensations. By inflating the air cushion one 201, air cushion two 202, and air cushion three 203, the expansion degree of the top left side of the air cushion one 201, air cushion two 202, and air cushion three 203 is greater than that of the top right side during inflation. This allows for better adjustment of the inclination of the mattress 1 as needed, and the different slopes can be adjusted to a horizontal state. When lying on the mattress 1, one does not need to resist the slope, can relax the body and mind, relieve muscle soreness, reduce the burden on the heart, and increase the rest effect.

[0054] When storing the mattress 1, deflate the air cushion 501, air spring 502, air cushion one 201, air cushion two 202, and air cushion three 203. After deflation, the air cushion 501, air spring 502, air cushion one 201, air cushion two 202, and air cushion three 203 can be hidden under the comfort layer 4. The deflated trunk mat 101 can be placed in the trunk of the car and used as a mat. The deflated rear seat back cushion 102 can be placed on the back of the rear seat of the car. In this way, the mattress 1 is stored, and the mattress 1 is better prevented from taking up too much space in the car.

[0055] This utility model is not limited to the above-described embodiments. Any changes in its shape or structure fall within the protection scope of this utility model. The protection scope of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A multifunctional car mattress, comprising a mattress (1), characterized in that, Also includes: The mattress (1) includes a trunk mat (101) and a rear seat backrest mat (102). The trunk mat (101) includes a trunk mat body (1011) and a connecting seat one (1012). The connecting seat one (1012) is fixedly installed on the side wall of one side of the trunk mat body (1011). The rear seat backrest mat (102) includes a backrest mat body (1021), a connecting seat two (1022) and a connecting seat three (1023). The connecting seat two (1022) and the connecting seat three (1023) are respectively fixedly installed on the side walls of the adjacent two sides of the backrest mat body (1021). The side wall of the backrest mat body (1021) is provided with a folding groove (3).

2. The multifunctional vehicle mattress as described in claim 1, characterized in that: The trunk mat (101) and the rear seat back cushion (102) are in a deflated state when the rear seats are normally upright. The trunk mat (101) is laid in the trunk after being deflated and used as a regular trunk mat. The rear seat back cushion (102) is attached to the back of the rear seats after being deflated and used as a regular rear seat back cushion. When the rear seats are folded down, both the trunk mat (101) and the rear seat back cushion (102) are in an inflatable state. They are on the same plane and form a whole inflatable car mattress, which is used as a mattress.

3. The multifunctional vehicle mattress as described in claim 1, characterized in that: The main body of the cushion (1011) and the main body of the backrest cushion (1021) are both composed of an adjustment layer (2), a comfort layer (4) and an air cushion layer (5). The bottom of the comfort layer (4) is fixedly provided with an air cushion layer (5), and the bottom of the air cushion layer (5) is fixedly provided with an adjustment layer (2).

4. The multifunctional vehicle mattress as described in claim 3, characterized in that: The adjustment layer (2) includes an air cushion one (201), an air cushion two (202), an air cushion three (203), a vent one (204), and a vent two (205). The air cushion one (201), air cushion two (202), and air cushion three (203) are fixedly connected from bottom to top. The air cushion three (203) and the air cushion (501) are connected by a vent one (204), and the air cushion two (202) and the air cushion one (201) are connected by a vent two (205).

5. The multifunctional vehicle mattress as described in claim 3, characterized in that: The air cushion layer (5) includes an air cushion (501), an air spring (502), and an isolation layer (503). An isolation layer (503) is fixedly connected to the bottom side wall of the air cushion (501). An air spring (502) is fixedly arranged at equal intervals on the inner side wall of the air cushion (501). A ventilation hole is added to the bottom of the air spring (502) to communicate with the isolation layer (503).

6. The multifunctional vehicle mattress as described in claim 3, characterized in that: The comfort layer (4) includes a filling layer (401) and a resistance wire (402). The filling layer (401) is fixedly disposed on the top of the air cushion (501), and the resistance wire (402) is fixedly disposed at equal intervals in the middle of the filling layer (401).

7. The multifunctional vehicle mattress as described in claim 1, characterized in that: The connecting seat 1 (1012) is fixedly provided with an adjusting layer air valve female head 1 (1111), an air spring air valve female head 1 (1112), an air cushion air valve female head 1 (1113), and a power interface female head 1 (1016). The adjusting layer air valve female head 1 (1111) is connected to the inflatable cushion 1 (201) on the box mat body (1011). The air spring air valve female head 1 (1112) is connected to the isolation layer (503) on the box mat body (1011). The air cushion air valve female head 1 (1113) is connected to the air cushion (501) on the box mat body (1011).

8. The multifunctional vehicle mattress as described in claim 1, characterized in that: The second connector (1022) is fixedly provided with a male connector for adjusting the air valve (1121), a male connector for air spring valve (1122), a male connector for air cushion valve (1123), and a male connector for power interface (1124). The third connector (1023) is fixedly provided with a female connector for adjusting the air valve (1125), a female connector for air spring valve (1126), a female connector for air cushion valve (1127), and a female connector for power interface (1128).

9. The multifunctional vehicle mattress as described in claim 8, characterized in that: The male connector (1121) of the regulating layer air valve and the female connector (1111) of the regulating layer air valve cooperate with each other; the male connector (1122) of the air spring air valve and the female connector (1112) of the air spring air valve cooperate with each other; the male connector (1123) of the air cushion air valve and the female connector (1113) of the air cushion air valve cooperate with each other; and the male connector (1124) of the power interface cooperates with the female connector (1016).

10. The multifunctional vehicle mattress as described in claim 8, characterized in that: The second adjusting layer air valve head (1125) is connected to the first inflatable cushion (201) on the backrest cushion body (1021), the second air spring air valve head (1126) is connected to the isolation layer (503) on the backrest cushion body (1021), and the second air cushion air valve head (1127) is connected to the air cushion (501) on the backrest cushion body (1021).

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