CN211663103U

CN211663103U - Adjustable safety seat

Info

Publication number: CN211663103U
Application number: CN201921258213.9U
Authority: CN
Inventors: 柴林伟
Original assignee: Zhuji City Lead Management Consulting Firm
Current assignee: Zhejiang Anwang Bicycle Co ltd
Priority date: 2019-08-05
Filing date: 2019-08-05
Publication date: 2020-10-13
Anticipated expiration: 2029-08-05

Abstract

The utility model discloses an adjustable safety seat, which comprises a safety seat main body, a headrest and an adjustable backrest, wherein the top of the safety seat main body is fixedly connected with the headrest, the bottom of the headrest is fixedly connected with the adjustable backrest, one side inside the adjustable backrest is fixedly connected with an adjusting rod, the middle part of the adjusting rod is fixedly connected with a fixed wheel, one side of the adjusting rod is fixedly connected with a fixed tooth, one side inside the adjustable backrest is movably connected with a connecting belt, the middle part inside the adjustable backrest is fixedly connected with a heating pipe, the heating pipe can heat the seat for a user in winter to improve the use feeling of the user, an air pressure pump can inflate and exhaust an air bag to improve the safety of the seat, the adjustable backrest can enable the user to adjust the height and the angle of the seat at will, so as to greatly meet the use feeling of the user, the adjustable safety seat, the safety is high, and the automobile accessory is suitable for the field of automobile accessories and has wide development prospect in the future.

Description

Adjustable safety seat

Technical Field

The utility model relates to the technical field of auto-parts, specifically be a safety seat with adjustable.

Background

The automobile seat is used for a user to rest and drive, the current automobile can be divided into two types, namely a leather seat and a flannelette seat, and further comprises a child seat and a racing seat, the average price of the common automobile seat is about eight hundred fifty to one thousand zero fifty dollars, the average price of a medium-grade automobile is about one thousand four hundred to one thousand six hundred dollars, the average price of a high-grade automobile is more than two thousand dollars, for most automobiles, the seat is more expensive than a gearbox, a chassis and an automobile body, and is used as an important part of the whole automobile, the sales volume of the automobile seat is closely related to the production and sales volume of the whole automobile, and the change of the production and sales volume of the automobile reflects the change of the market demand of the automobile seat.

But car seat design above the existing market has a lot, but general security is not high, when the driver's cabin user meets unexpected stranded, the seat can restrict user's space, does not have bigger space to let the user break away from danger, and current car seat is inconvenient in the aspect of the seat height, can't satisfy user's use sense, current car seat adopts the leather seat can be very cold when winter, does not have heating device heating seat can let very uncomfortable that the user sat.

Therefore, how to design an adjustable safety seat becomes a problem to be solved at present.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a safety seat with adjustable to the security that proposes in solving above-mentioned background art is not high, adjust inconvenient and do not have heating device's problem.

In order to achieve the above object, the utility model provides a following technical scheme: an adjustable safety seat comprises a safety seat body, a headrest and an adjustable backrest, wherein the headrest is fixedly connected to the top of the safety seat body, the outer wall of the bottom of the headrest is connected with the outer wall of the top of the safety seat body, the adjustable backrest is fixedly connected to the bottom of the headrest, the outer wall of the top of the adjustable backrest is connected with the outer wall of the bottom of the headrest, an adjusting rod is fixedly connected to one side of the inner portion of the adjustable backrest, the outer wall of the periphery of the adjusting rod is connected with the inner wall of the adjustable backrest, a fixing wheel is fixedly connected to the middle of the adjusting rod, the outer wall of the back of the fixing wheel is connected with the outer wall of the front of the adjusting rod, fixing teeth are fixedly connected to one side of the adjusting rod, the outer wall of one side of the fixing teeth is connected with the outer wall of the, the outer peripheral wall of the connecting belt is connected with the inner wall of the adjustable backrest, the bottom of the adjustable backrest is movably connected with a cushion, the outer top wall of the cushion is connected with the outer bottom wall of the adjustable backrest, the bottom of the cushion is fixedly connected with an exhaust base, the outer top wall of the exhaust base is connected with the outer bottom wall of the cushion, the outer periphery of the exhaust base is fixedly connected with an exhaust base shell, the inner wall of the exhaust base shell is connected with the outer peripheral wall of the exhaust base, the middle part of the inside of the exhaust base is fixedly connected with a supporting plate, the outer peripheral wall of the supporting plate is connected with the inner wall of the exhaust base, the middle part of the supporting plate is connected with a connecting hole in a penetrating way, the outer peripheral wall of the connecting hole is connected with the inner wall of the supporting plate, the inner top of the exhaust, the utility model discloses a pneumatic backrest, including adjustable back, air pump, air outlet, exhaust base, adjusting button, air inlet, air outlet, air pump, air outlet, the embedding of opposite side top of adjustable back is connected with adjusting button, adjusting button's peripheral outer wall links to each other with the inside inner wall of adjustable back, the inside middle part fixedly connected with pneumatic pump of gasbag, the peripheral outer wall of pneumatic pump links to each other with the inside inner wall of gasbag, the middle part through connection of pneumatic pump has the induction port, the peripheral outer wall of induction port links to each other with the inside inner wall of pneumatic pump, the opposite side fixedly connected with gas outlet of pneumatic pump, one side outer wall of gas outlet links to each other with.

Preferably, the top of the adjusting rod is movably connected with a movable wheel, and the outer wall of the rear part of the movable wheel is connected with the outer wall of the front part of the adjusting rod.

Preferably, the middle part of the inner part of the adjustable backrest is fixedly connected with a heating pipe, and the outer peripheral wall of the heating pipe is connected with the inner wall of the inner part of the adjustable backrest.

Preferably, one side of the inside of the exhaust base is fixedly connected with a return spring, and the peripheral outer wall of the return spring is connected with the inner wall of the inside of the exhaust base.

Preferably, the inner side of the air bag is fixedly connected with a supporting strip, and the peripheral outer wall of the supporting strip is connected with the inner wall of the air bag.

Preferably, the contact area of the bottom of the adjustable backrest and the cushion is the same, and the adjustable backrest is formed by combining an adjusting rod, a fixed gear, a heating pipe, a movable wheel and a fixed wheel.

Preferably, the contact area between the periphery of the pneumatic pump and the airbag is the same, and the pneumatic pump is formed by combining an air outlet and an air suction port.

Compared with the prior art, the beneficial effects of the utility model are that:

1. this kind of safety seat with adjustable adjust the top swing joint of pole has the movable wheel, and the back outer wall of movable wheel links to each other with the preceding outer wall of adjusting the pole, and the movable wheel is equipped with two above adjusting the pole, and inside is connected through the bearing and is rotated the connecting band that drives above adjusting the pole and fixed tooth rotation to realize adjusting the height-adjusting function of pole, promoted the functionality of safety seat main part greatly.

2. This kind of safety seat with adjustable, the inside middle part fixedly connected with heating pipe of adjustable back, the peripheral outer wall of heating pipe links to each other with the inside inner wall of adjustable back, the heating pipe is direct to link to each other with the inside battery of car, the heating pipe is direct to be worked through the battery power supply, in the time of heating pipe work, the electric energy that utilizes to acquire makes the inside electric wire circular telegram of heating pipe generate heat, thereby let the outside body of heating pipe also generate heat, make the safety seat main part reach the purpose of heating, when the user drives a vehicle winter, the heating pipe can let the user more comfortable warmly when driving a vehicle or having a rest, the travelling comfort of safety seat main part has been embodied.

3. This kind of safety seat with adjustable, inside one side fixedly connected with reset spring of exhaust base, reset spring's peripheral outer wall links to each other with exhaust base's inside inner wall, fix above exhaust base during reset spring, when the gasbag aerifys and props big with exhaust base, reset spring will be elongated, reset spring's elasticity can restrict exhaust base and lead to the damage because excessively prop big simultaneously, when exhaust base is gassing, reset spring's elasticity can accelerate exhaust base's gassing speed, the high efficiency of safety seat main part has been embodied.

4. This kind of safety seat with adjustable, the inboard fixedly connected with support bar of gasbag, the peripheral outer wall of support bar links to each other with the inside inner wall of gasbag, when the gasbag aerifys to be full of and reaches the biggest, the support bar is supporting the gasbag, prevent that the gasbag from appearing the damage because live time overlength or misuse, the support bar is connecting the gasbag just like the inner tube of a tyre and cover tire of car in addition, just be the outside damage of gasbag and can not influence the whole effect of gasbag yet, the safety seat main part has been embodied and the security.

5. This kind of safety seat with adjustable, the bottom of adjustable back is the same with the area of contact of cushion, and adjustable back is by adjusting the pole, fixed tooth, the heating pipe, loose-wheel and tight pulley combination form, when the user is in needs driving or rest, it is more comfortable when adjustable back lets the user rest, make user's driving feel better, the user can let the inside loose-wheel of adjustable back rotate through pressing adjustment button above the safety seat main part, the user just can oneself adjust the upper and lower height and the horizontal angle of safety seat main part at will, after the position that reaches user's needs, the tight pulley can restrict the rotation of loose-wheel through the connecting band, adjustable back will be fixed to fixed tooth, adjustable back has satisfied user's use greatly and has felt.

6. The adjustable safety seat has the advantages that the contact area of the periphery of the pneumatic pump and the air bag is the same, the pneumatic pump is formed by combining the air outlet and the air suction port, the pneumatic pump is connected with a storage battery of an automobile, the storage battery directly provides electric energy for the operation work of the pneumatic pump, the exhaust valve can be rotated to one side when a user needs to inflate the air bag, the pneumatic pump can obtain the electric energy from the storage battery to inflate the air bag when the exhaust valve rotates, the user can control the inflation amount according to the needs of the user to realize the height change of the exhaust base, the adjustable safety seat is suitable for different crowds, the exhaust valve can be rotated to the other side when the user needs to deflate, the pneumatic pump in the air bag can start to depressurize and deflate the air bag, the user can reduce the height of the exhaust base, when the user is intentionally blocked in a cab, the user can deflate the air in the air bag to increase, the user can have a larger space to be rescued, and the safety of the safety seat main body is improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic sectional view of the adjustable backrest of the present invention;

FIG. 3 is a schematic sectional view of the exhaust base according to the present invention;

fig. 4 is a schematic view of the sectional structure of the airbag of the present invention.

In the figure: 1. a safety seat main body; 2. a headrest; 3. the backrest can be adjusted; 301. a movable wheel; 302. a fixed wheel; 303. fixing teeth; 304. heating a tube; 305. a connecting belt; 306. adjusting a rod; 4. a cushion; 5. An exhaust valve; 6. an exhaust base; 601. an exhaust base housing; 602. connecting holes; 603. a return spring; 604. a support plate; 7. an adjustment button; 8. an air bag; 801. a supporting strip; 802. a pneumatic pump; 803. an air outlet; 804. an air suction opening.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: an adjustable safety seat comprises a safety seat body 1, a headrest 2 and an adjustable backrest 3, the headrest 2 is fixedly connected to the top of the safety seat body 1, the outer wall of the bottom of the headrest 2 is connected with the outer wall of the top of the safety seat body 1, the adjustable backrest 3 is fixedly connected to the bottom of the headrest 2, the outer wall of the top of the adjustable backrest 3 is connected with the outer wall of the bottom of the headrest 2, an adjusting rod 306 is fixedly connected to one side of the inner portion of the adjustable backrest 3, the outer wall of the periphery of the adjusting rod 306 is connected with the inner wall of the adjustable backrest 3, a fixed wheel 302 is fixedly connected to the middle portion of the adjusting rod 306, the outer wall of the back of the fixed wheel 302 is connected with the outer wall of the front of the adjusting rod 306, a fixed tooth 303 is fixedly connected to one side of the adjusting rod 306, the outer wall of one side of the fixed tooth, the outer peripheral wall of the connecting belt 305 is connected with the inner wall of the adjustable backrest 3, the bottom of the adjustable backrest 3 is movably connected with a cushion 4, the outer top wall of the cushion 4 is connected with the outer bottom wall of the adjustable backrest 3, the bottom of the cushion 4 is fixedly connected with an exhaust base 6, the outer top wall of the exhaust base 6 is connected with the outer bottom wall of the cushion 4, the outer periphery of the exhaust base 6 is fixedly connected with an exhaust base shell 601, the inner wall of the exhaust base shell 601 is connected with the outer peripheral wall of the exhaust base 6, the middle part of the inner part of the exhaust base 6 is fixedly connected with a supporting plate 604, the outer peripheral wall of the supporting plate 604 is connected with the inner wall of the exhaust base 6, the middle part of the supporting plate 604 is connected with a connecting hole 602 in a penetrating way, the outer peripheral wall of, the outer wall of the periphery of the air bag 8 is connected with the inner wall of the exhaust base 6, the top of the other side of the adjustable backrest 3 is connected with an adjusting button 7 in an embedded mode, the outer wall of the periphery of the adjusting button 7 is connected with the inner wall of the adjustable backrest 3, the middle portion of the inner portion of the air bag 8 is fixedly connected with an air pressure pump 802, the outer wall of the periphery of the air pressure pump 802 is connected with the inner wall of the air bag 8, the middle portion of the air pressure pump 802 is connected with an air suction port 804 in a penetrating mode, the outer wall of the periphery of the air suction port 804 is connected with the inner wall of the air pressure pump 802, the other side of the air pressure pump 802 is fixedly connected with an air outlet 803, the outer wall of one side of the air outlet 803 is connected with the.

Preferably, the top of the adjusting rod 306 is movably connected with two movable wheels 301, the outer wall of the back of each movable wheel 301 is connected with the outer wall of the front of the adjusting rod 306, the two movable wheels 301 are arranged on the upper surface of the adjusting rod 306, and the inner parts of the two movable wheels are connected and rotated through bearings to drive the connecting belt 305 and the fixed teeth 303 on the upper surface of the adjusting rod 306 to rotate, so that the height adjusting function of the adjusting rod 306 is realized, and the functionality of the safety seat main body 1 is greatly improved.

Preferably, the inside middle part fixedly connected with heating pipe 304 of adjustable back 3, the peripheral outer wall of heating pipe 304 links to each other with adjustable back 3's inside inner wall, heating pipe 304 is direct to link to each other with the inside battery of car, heating pipe 304 is direct to work through the battery power supply, in the work of heating pipe 304, utilize the electric energy of acquireing to make the inside electric wire circular telegram of heating pipe 304 generate heat, thereby let the outside body of heating pipe 304 also generate heat, make safety seat main part 1 reach the purpose of heating, when the user drives a vehicle winter, heating pipe 304 can let the user more comfortable warmly when driving a vehicle or having a rest, the travelling comfort of safety seat main part 1 has been embodied.

Preferably, inside one side fixedly connected with reset spring 603 of exhaust base 6, reset spring 603's peripheral outer wall links to each other with the inside inner wall of exhaust base 6, fix on exhaust base 6 during reset spring 603, when gasbag 8 aerifys and props big exhaust base 6, reset spring 603 will be elongated, reset spring 603's elasticity can restrict exhaust base 6 and lead to the damage because excessively prop big simultaneously, when the gassing of exhaust base 6, the gassing speed of exhaust base 6 can be accelerated to reset spring 603's elasticity, the high efficiency of safety seat main part 1 has been embodied.

Preferably, the inside fixedly connected with support bar 801 of gasbag 8, the peripheral outer wall of support bar 801 links to each other with the inside inner wall of gasbag 8, when gasbag 8 aerifys to be full of and reaches the biggest, support bar 801 is supporting gasbag 8, prevent that gasbag 8 from appearing the breakage because live time overlength or misuse, and support bar 801 is connecting gasbag 8 just like the inner tube and the cover tire of car, even the outside breakage of gasbag 8 can not influence the whole effect of gasbag 8 yet, embodied safety seat main part 1 and the security.

Preferably, the bottom of the adjustable backrest 3 is the same as the contact area of the seat cushion 4, and the adjustable backrest 3 is formed by combining an adjusting rod 306, a fixed gear 303, a heating pipe 304, a movable gear 301 and a fixed gear 302, when a user needs to drive or have a rest, the adjustable backrest 3 is more comfortable when the user has a rest, so that the driving feeling of the user is better, the user can press an adjusting button 7 on the safety seat main body 1 to rotate the movable gear 301 inside the adjustable backrest 3, the user can freely adjust the up-down height and the horizontal angle of the safety seat main body 1, after the position required by the user is reached, the fixed gear 302 can limit the rotation of the movable gear 301 through a connecting belt 305, the fixed gear 303 can fix the adjustable backrest 3, and the adjustable backrest 3 greatly meets the use feeling of the user.

Preferably, the contact area of the periphery of the pneumatic pump 802 and the air bag 8 is the same, and the pneumatic pump 802 is formed by combining an air outlet 803 and an air suction port 804, the pneumatic pump 802 is connected with a storage battery of an automobile, the storage battery directly provides electric energy for the operation of the pneumatic pump 802, when a user needs to inflate the air bag 8, the exhaust valve 5 can be rotated to one side, the pneumatic pump 802 obtains the electric energy from the storage battery to inflate the air bag 8 when the exhaust valve 5 rotates, the user can control the inflation amount according to the own needs to realize the height change of the exhaust base 6, the air bag can be suitable for different people, when the user needs to deflate, the exhaust valve 5 can be rotated to the other side, the pneumatic pump 802 inside the air bag 8 starts to depressurize and deflate the air bag 8, the user can lower the height of the exhaust base 6 in such a way, when the user is intentionally out of being, the user can increase the space of oneself with the inside gas evacuation of gasbag 8, lets the user have bigger space to be rescued, has promoted the security of safety seat main part 1.

The working principle is as follows: firstly, the adjustable safety seat is installed at a corresponding position, then, the movable wheel 301 is connected and rotated through a bearing to drive the connecting belt 305 and the fixed teeth 303 on the adjusting rod 306 to rotate, so that the height adjusting function of the adjusting rod 306 is realized, the functionality of the safety seat main body 1 is greatly improved, then, the heating pipe 304 is directly connected with a storage battery inside an automobile, the heating pipe 304 directly works by supplying power to the storage battery, when the heating pipe 304 works, an electric wire inside the heating pipe 304 is electrified and heated by using the obtained electric energy, so that the outer pipe body of the heating pipe 304 is also heated, the safety seat main body 1 achieves the purpose of heating, when a user drives a vehicle in winter, the heating pipe 304 can enable the user to be more comfortable and warm during driving or resting, the comfort of the safety seat main body 1 is reflected, and then, when a user needs to drive or rest, the adjustable backrest 3 enables the user to rest more comfortably and the driving feeling of the user is better, the user can press the adjusting button 7 on the safety seat main body 1 to enable the movable wheel 301 inside the adjustable backrest 3 to rotate, the user can adjust the vertical height and the horizontal angle of the safety seat main body 1 at will, after the position required by the user is reached, the fixed wheel 302 can limit the rotation of the movable wheel 301 through the connecting belt 305, the fixed tooth 303 can fix the adjustable backrest 3, the adjustable backrest 3 greatly meets the using feeling of the user, finally, the air pressure pump 802 is connected with a storage battery of an automobile, the storage battery directly provides electric energy for the operation work of the air pressure pump 802, the exhaust valve 5 can be rotated to one side when the user needs to inflate the air bag 8, the air pressure pump 802 can obtain the electric energy from the storage battery to inflate the air bag 8 when the exhaust valve 5 rotates, the user can control according to the needs of oneself and aerify how much, realize exhaust base 6's altitude variation, can be fit for different crowds, can rotate discharge valve 5 to the opposite side when the user needs the gassing, the inside pneumatic pump 802 of gasbag 8 will begin to reduce the pressure and bleed for gasbag 8, the user can reduce exhaust base 6's height like this, it is unexpected that the user is blocked when not coming in the driver's cabin, the user can be with the inside gas evacuation of gasbag 8 and increase own space, let the user can have bigger space to obtain a rescue, the security of safety seat main part 1 has been promoted, this is exactly this kind of adjustable safety seat's theory of operation.

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

Claims

1. An adjustable safety seat, includes safety seat main part (1), headrest (2) and adjustable back (3), its characterized in that: the safety seat is characterized in that the top of the safety seat body (1) is fixedly connected with a headrest (2), the bottom outer wall of the headrest (2) is connected with the top outer wall of the safety seat body (1), the bottom of the headrest (2) is fixedly connected with an adjustable backrest (3), the top outer wall of the adjustable backrest (3) is connected with the bottom outer wall of the headrest (2), one side of the interior of the adjustable backrest (3) is fixedly connected with an adjusting rod (306), the peripheral outer wall of the adjusting rod (306) is connected with the inner wall of the adjustable backrest (3), the middle part of the adjusting rod (306) is fixedly connected with a fixed wheel (302), the rear outer wall of the fixed wheel (302) is connected with the front outer wall of the adjusting rod (306), one side of the adjusting rod (306) is fixedly connected with a fixed tooth (303), one side outer wall of the fixed tooth (303) is connected with the other side outer wall of the adjusting rod (, the adjustable backrest is characterized in that a connecting belt (305) is movably connected to one side of the interior of the adjustable backrest (3), the peripheral outer wall of the connecting belt (305) is connected with the inner wall of the adjustable backrest (3), the bottom of the adjustable backrest (3) is movably connected with a cushion (4), the top outer wall of the cushion (4) is connected with the bottom outer wall of the adjustable backrest (3), the bottom of the cushion (4) is fixedly connected with an exhaust base (6), the top outer wall of the exhaust base (6) is connected with the bottom outer wall of the cushion (4), the periphery of the exhaust base (6) is fixedly connected with an exhaust base shell (601), the inner wall of the exhaust base shell (601) is connected with the peripheral outer wall of the exhaust base (6), a supporting plate (604) is fixedly connected to the middle portion of the interior of the exhaust base (6), the peripheral outer wall of the supporting plate (604) is connected with the inner wall of the exhaust base (, the middle part of the supporting plate (604) is connected with a connecting hole (602) in a penetrating manner, the peripheral outer wall of the connecting hole (602) is connected with the inner wall of the supporting plate (604), the inner top of the exhaust base (6) is fixedly connected with an air bag (8), the peripheral outer wall of the air bag (8) is connected with the inner wall of the exhaust base (6), the top of the other side of the adjustable backrest (3) is connected with an adjusting button (7) in an embedded manner, the peripheral outer wall of the adjusting button (7) is connected with the inner wall of the adjustable backrest (3), the inner middle part of the air bag (8) is fixedly connected with an air pressure pump (802), the peripheral outer wall of the air pressure pump (802) is connected with the inner wall of the air bag (8), the middle part of the air pressure pump (802) is connected with an air suction port (804) in a penetrating manner, and the peripheral outer wall of the air, the other side fixedly connected with gas outlet (803) of pneumatic pump (802), the opposite side outer wall of one side of gas outlet (803) links to each other with the opposite side outer wall of pneumatic pump (802), the dead ahead middle part embedding of exhaust base (6) is connected with discharge valve (5), the peripheral outer wall of discharge valve (5) links to each other with the inside inner wall of exhaust base (6).

2. An adjustable safety seat as set forth in claim 1, wherein: the top of the adjusting rod (306) is movably connected with a movable wheel (301), and the outer wall of the back of the movable wheel (301) is connected with the outer wall of the front of the adjusting rod (306).

3. An adjustable safety seat as set forth in claim 1, wherein: the heating pipe (304) is fixedly connected to the middle part of the inner part of the adjustable backrest (3), and the outer peripheral wall of the heating pipe (304) is connected with the inner wall of the inner part of the adjustable backrest (3).

4. An adjustable safety seat as set forth in claim 1, wherein: a reset spring (603) is fixedly connected to one side of the interior of the exhaust base (6), and the peripheral outer wall of the reset spring (603) is connected with the inner wall of the interior of the exhaust base (6).

5. An adjustable safety seat as set forth in claim 1, wherein: the inboard fixedly connected with support bar (801) of gasbag (8), the peripheral outer wall of support bar (801) links to each other with the inside inner wall of gasbag (8).

6. An adjustable safety seat as set forth in claim 1, wherein: the contact area of the bottom of the adjustable backrest (3) is the same as that of the cushion (4), and the adjustable backrest (3) is formed by combining an adjusting rod (306), a fixed gear (303), a heating pipe (304), a movable wheel (301) and a fixed wheel (302).

7. An adjustable safety seat as set forth in claim 1, wherein: the contact area of the periphery of the pneumatic pump (802) and the air bag (8) is the same, and the pneumatic pump (802) is formed by combining an air outlet (803) and an air inlet (804).