阅读说明：本技术 一种消防员救生自动保护设备 (Automatic protection equipment for firefighter lifesaving ) 是由 陈忠辉 陈辉 于 2021-01-09 设计创作，主要内容包括：本发明公开了一种消防员救生自动保护设备,包括背箱和设在背箱内的开口向上的传动腔,传动腔前后壁上下滑动连接有向上延伸至背箱上侧的连接块,连接块内设有开口向上的按钮腔,按钮腔前后壁上下滑动连接有升降块,升降块上端面固定连接有伸缩板,伸缩板内设有卷绕轮腔,卷绕轮腔左右两侧设有开口分别向左右两侧且对称的伸缩腔,伸缩腔前后壁左右滑动连接有伸缩块,左右两侧伸缩腔相互靠近的一侧壁与卷绕轮腔左右两侧壁之间分别连通设有连通腔,按钮腔下壁固定连接有贯穿升降块且向上延伸至卷绕轮腔内的固定齿条块。本发明在消防员的上方有物体坠落时,能够触发弹簧推动伸缩块弹出,并带动整个伸缩板转动,从而为消防员挡住上方的坠落物。(The invention discloses automatic protection equipment for firefighter lifesaving, which comprises a back box and a transmission cavity, wherein the transmission cavity is arranged in the back box and provided with an upward opening, the front wall and the rear wall of the transmission cavity are vertically and slidably connected with a connecting block extending upwards to the upper side of the back box, a button cavity with an upward opening is arranged in the connecting block, the front wall and the rear wall of the button cavity are vertically and slidably connected with a lifting block, the upper end surface of the lifting block is fixedly connected with a telescopic plate, a winding wheel cavity is arranged in the telescopic plate, the left side and the right side of the winding wheel cavity are provided with telescopic cavities with openings which are respectively symmetrical towards the left side and the right side, the front wall and the rear wall of the telescopic cavity are horizontally and slidably connected with telescopic blocks, one side wall, close to each other, of the left side and the right side of the telescopic cavities and. When an object above a fireman falls, the telescopic block can be triggered to push the telescopic block to pop out, and the whole telescopic plate is driven to rotate, so that the object above the fireman is blocked.)

1. A fire fighter lifesaving automatic protection device is characterized by comprising a back box and a transmission cavity which is arranged in the back box and provided with an upward opening, wherein the front wall and the rear wall of the transmission cavity are vertically and slidably connected with a connecting block extending upwards to the upper side of the back box, a button cavity with an upward opening is arranged in the connecting block, the front wall and the rear wall of the button cavity are vertically and slidably connected with a lifting block, the upper end surface of the lifting block is fixedly connected with a telescopic plate, a winding wheel cavity is arranged in the telescopic plate, the left side and the right side of the winding wheel cavity are provided with telescopic cavities with openings which are respectively symmetrical towards the left side and the right side, the front wall and the rear wall of the telescopic cavity are horizontally and slidably connected with telescopic blocks, a side wall, close to each other, of the left side and the right side of the winding wheel cavity are respectively communicated with a communication cavity, the lower wall of the button cavity is fixedly connected with, the fixed contact switch that is equipped with of button chamber right wall, fixed rack piece right-hand member face upper end fixedly connected with chucking rack, the back wall rotates before the winding wheel chamber and is connected with the winding wheel axle, the outer disc fixedly connected with of winding wheel axle can with the driven chucking gear of chucking rack meshing, the outer disc fixedly connected with of winding wheel axle is located the winding wheel of chucking gear rear side, the outer disc winding of winding wheel is accomodate and is controlled flexible piece side end face fixed connection's that is close to stay cord each other, the stay cord runs through the intercommunication chamber, control fixedly connected with thrust spring between the side end face that flexible piece is close to each other and the side wall that flexible chamber is close to each other about, winding wheel chamber equipment intercommunication is equipped with the ascending chamber of stepping.

2. A firefighter lifesaving automatic protection device according to claim 1, wherein the left and right walls of the transmission chamber are slidably connected with an adjusting block up and down, the upper end surface of the adjusting block is rotatably connected with a rotating shaft fixedly connected with the lower end surface of the connecting block, the outer circular surface key of the rotating shaft is connected with a switching bevel gear, and the upper end of the left wall of the transmission chamber is rotatably connected with a fan shaft extending to the right side of the back box.

3. A firefighter lifesaving automatic protection device according to claim 2, wherein a bidirectional motor is fixedly arranged on the left wall of the transmission cavity, the right end face of the bidirectional motor is in power connection with the left end face of the fan shaft, a fan bevel gear which can be in meshing transmission with the switching bevel gear is fixedly connected to the outer circular face of one side of the fan shaft located in the transmission cavity, a fan cover is fixedly connected to the right end face of the back box, a fan cavity is arranged in the fan cover, and the fan shaft extends rightwards into the fan cavity and a fan is fixedly connected to the outer circular face of one side located in the fan cavity.

4. A firefighter lifesaving automatic protection device according to claim 2, wherein a bevel gear cavity with a downward opening is arranged on the left side of the transmission cavity, a threaded connection block is connected to the front wall and the rear wall of the bevel gear cavity in a vertically sliding manner and extends downwards to the lower side of the back box, a roller block is arranged on the lower side of the threaded connection block, a spring cavity with an upward opening is arranged in the roller block, the threaded connection block extends downwards into the spring cavity and is connected with the spring cavity in a vertically sliding manner, and an internal threaded cavity with an upward opening is arranged in the threaded connection block.

5. A firefighter lifesaving automatic protective equipment according to claim 4, wherein the left end face of the bidirectional motor is in power connection with a bevel gear shaft which extends leftwards into the bevel gear cavity and is in rotational connection with the left wall of the bevel gear cavity, the lower side of the bevel gear shaft is provided with a lifting screw which extends downwards into the internal thread cavity and is in threaded connection with the internal thread cavity, a bevel gear pair which is meshed with each other is fixedly connected between the top end of the outer circular surface of the lifting screw and the outer circular surface of the bevel gear shaft, a button spring is fixedly connected between the lower wall of the spring cavity and the lower end face of the threaded connection block, a button positioned on the right side of the button spring is fixedly arranged on the lower wall of the spring cavity, roller shafts which extend towards the front side and the rear side are rotatably.

6. A firefighter lifesaving automatic protection device according to claim 1, wherein a seat plate is fixedly connected to the bottom end of the left end surface of the back box, a descending rack cavity with an upward opening is arranged in the seat plate, a descending block is slidably connected to the front and rear walls of the descending rack cavity up and down, an ascending cavity with an upward opening is arranged at the left side of the descending rack cavity, an ascending block is slidably connected to the front and rear walls of the ascending cavity up and down, and a transmission belt cavity is communicated between the right wall of the ascending cavity and the left wall of the descending rack cavity.

7. A firefighter lifesaving automatic protection device according to claim 6, wherein a descending rack is fixedly connected to the left end face of the descending block, an ascending rack is fixedly connected to the right end face of the ascending block, a right gear shaft is rotatably connected to the right end of the front and rear walls of the belt cavity, and a right gear capable of being in meshing transmission with the descending rack is fixedly connected to the outer circumferential surface of the right gear shaft.

8. The automatic fire-fighter lifesaving protection device according to claim 7, wherein a left gear shaft is rotatably connected to the left end of the front and rear walls of the transmission belt cavity, a left gear capable of being meshed with the ascending rack is fixedly connected to the outer circular surface of the left gear shaft, a transmission belt positioned in front of the right gear and the left gear is dynamically connected between the left gear shaft and the right gear shaft, baffles are rotatably connected to the front and rear end surfaces of the ascending block, and baffle torsion springs are fixedly arranged at the joints of the baffles and the ascending block.

9. A firefighter lifesaving automatic protection device according to claim 1, wherein an adjusting screw rod extending upwards into the transmission cavity is rotatably connected to the lower side of the back box, a handle is fixedly connected to the lower end surface of the adjusting screw rod, and the adjusting screw rod extends upwards into the adjusting block and is in threaded connection with the adjusting block.

10. A firefighter lifesaving automatic protection device according to claim 1, wherein a limiting block is hinged to the left end of the upper wall of the connecting block, a limiting torsion spring is fixedly arranged at the hinged position of the limiting block and the connecting block, an electromagnet is fixedly arranged on the lower end face of the connecting block, a magnetic block corresponding to the electromagnet is fixedly arranged on the upper end face of the switching bevel gear, and a clutch spring is fixedly connected between the upper end face of the switching bevel gear and the lower end face of the connecting block.

Technical Field

The invention relates to the field of fire protection and lifesaving, in particular to an automatic lifesaving protection device for firemen.

Background

In various conflagrations, because the complexity of accident site environment, by the thing that falls, dense smoke etc. cause the injured accident of fire fighter very much, cause personnel's damage very easily, and when rescuing injured personnel, need fire fighter's both hands to carry out the bearing to personnel, not only very big consumption fire fighter's physical power, the inconvenience of fire fighter action has still been caused simultaneously, consequently some current fire fighter lifesaving auxiliary assembly are difficult to fine play the additional work to the fire fighter, and supplementary effect is not good, need treat to improve urgently.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides automatic lifesaving protection equipment for firemen, which aims to overcome the technical defects that the prior art is difficult to well assist the firemen and has poor assisting effect.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a fire fighter lifesaving automatic protection device comprises a back box and a transmission cavity with an upward opening arranged in the back box, wherein the front wall and the rear wall of the transmission cavity are vertically and slidably connected with a connecting block extending upwards to the upper side of the back box, a button cavity with an upward opening is arranged in the connecting block, the front wall and the rear wall of the button cavity are vertically and slidably connected with a lifting block, the upper end surface of the lifting block is fixedly connected with a telescopic plate, a winding wheel cavity is arranged in the telescopic plate, the left side and the right side of the winding wheel cavity are respectively provided with a telescopic cavity with symmetrical openings towards the left side and the right side, the front wall and the rear wall of the telescopic cavity are horizontally and slidably connected with a telescopic block, a side wall, close to each other, of the telescopic cavities at the left side and the right side are respectively communicated with a communicating cavity, the lower wall of the button cavity is fixedly connected with a fixed rack, the fixed contact switch that is equipped with of button chamber right wall, fixed rack piece right-hand member face upper end fixedly connected with chucking rack, the back wall rotates before the winding wheel chamber and is connected with the winding wheel axle, the outer disc fixedly connected with of winding wheel axle can with the driven chucking gear of chucking rack meshing, the outer disc fixedly connected with of winding wheel axle is located the winding wheel of chucking gear rear side, the outer disc winding of winding wheel is accomodate and is controlled flexible piece side end face fixed connection's that is close to stay cord each other, the stay cord runs through the intercommunication chamber, control fixedly connected with thrust spring between the side end face that flexible piece is close to each other and the side wall that flexible chamber is close to each other about, winding wheel chamber equipment intercommunication is equipped with the ascending chamber of stepping.

Preferably, the upper and lower sliding connection of the left and right walls of the transmission cavity has an adjusting block, the upper end surface of the adjusting block is rotatably connected with a rotating shaft fixedly connected with the lower end surface of the connecting block, the outer circular surface key of the rotating shaft is connected with a switching bevel gear, and the upper end of the left wall of the transmission cavity is rotatably connected with a fan shaft extending rightwards to the right side of the back box.

Preferably, the transmission chamber left wall is fixed and is equipped with two-way motor, and two-way motor right-hand member face is connected with fan axle left end face power, and the outer disc fixedly connected with in one side that the fan axle is located the transmission intracavity can with switch the driven fan bevel gear of bevel gear meshing, and back of the body case right-hand member face fixedly connected with fan casing is equipped with the fan chamber in the fan casing, and the fan axle extends to the fan intracavity and is located the outer disc fixedly connected with fan in one side of fan intracavity rightwards.

Preferably, the transmission chamber left side is equipped with the bevel gear chamber that the opening is decurrent, and sliding connection has down to the threaded connection piece of back of the body case downside around the bevel gear chamber, and the threaded connection piece downside is equipped with the gyro wheel piece, is equipped with the ascending spring chamber of opening in the gyro wheel piece, and sliding connection about the threaded connection piece extends the spring intracavity downwards and with the spring chamber, is equipped with the ascending interior thread cavity of opening in the threaded connection piece.

Preferably, the left end face of the bidirectional motor is in power connection with a bevel gear shaft which extends leftwards into a bevel gear cavity and is connected with the left wall of the bevel gear cavity in a rotating mode, a lifting screw rod which extends downwards into an internal thread cavity and is connected with the internal thread cavity in a threaded mode is arranged on the lower side of the bevel gear shaft, a bevel gear pair which is meshed with each other in a fixed connection mode is arranged between the top end of the outer circular face of the lifting screw rod and the outer circular face of the bevel gear shaft, a button spring is fixedly connected between the lower wall of the spring cavity and the lower end face of a threaded connection block, a button which is located on the right side of the button spring is fixedly arranged on the lower wall of the spring cavity.

Preferably, the bottom end of the left end face of the back box is fixedly connected with a seat plate, a descending rack cavity with an upward opening is arranged in the seat plate, a descending block is connected to the front wall and the rear wall of the descending rack cavity in a sliding mode from top to bottom, an ascending cavity with an upward opening is arranged on the left side of the descending rack cavity, an ascending block is connected to the front wall and the rear wall of the ascending cavity in a sliding mode from top to bottom, and a transmission belt cavity is communicated between the right wall of the ascending cavity and the left wall.

Preferably, the left end face of the descending block is fixedly connected with a descending rack, the right end face of the ascending block is fixedly connected with an ascending rack, the right end of the front and rear walls of the transmission belt cavity is rotatably connected with a right gear shaft, and the outer circular surface of the right gear shaft is fixedly connected with a right gear which can be in meshing transmission with the descending rack.

Preferably, the front and rear wall left end of the transmission belt cavity is rotatably connected with a left side gear shaft, the outer circular surface of the left side gear shaft is fixedly connected with a left side gear which can be meshed with a rising rack for transmission, a transmission belt which is positioned on the front side of the right side gear and the left side gear is dynamically connected between the left side gear shaft and the right side gear shaft, the front and rear end faces of the rising block are rotatably connected with a baffle, and a baffle torsion spring is fixedly arranged at the hinged position of the baffle and the rising block.

Preferably, the lower side of the back box is rotatably connected with an adjusting screw rod which extends upwards into the transmission cavity, the lower end face of the adjusting screw rod is fixedly connected with a handle, and the adjusting screw rod extends upwards into the adjusting block and is in threaded connection with the adjusting block.

Preferably, the left end of the upper wall of the connecting block is hinged to a limiting block, a limiting torsion spring is fixedly arranged at the hinged position of the limiting block and the connecting block, an electromagnet is fixedly arranged on the lower end face of the connecting block, a magnetic block corresponding to the electromagnet is fixedly arranged on the upper end face of the switching bevel gear, and a clutch spring is fixedly connected between the upper end face of the switching bevel gear and the lower end face of the connecting block.

(III) advantageous effects

When an object above a fireman falls, the telescopic block can be triggered to push the telescopic block to pop out, and the whole telescopic plate is driven to rotate, so that the object above the fireman is blocked.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of A in FIG. 1;

FIG. 3 is an enlarged schematic view of B of FIG. 1;

FIG. 4 is an enlarged schematic view of C in FIG. 1;

FIG. 5 is an enlarged schematic view of D of FIG. 1;

FIG. 6 is an enlarged schematic view of E-E of FIG. 5;

fig. 7 is a schematic diagram of a method of an embodiment of the invention.

Detailed Description

The technical solutions 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 a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 6, the automatic protection device for firefighter lifesaving of this embodiment includes a back box 11, a transmission cavity 12 with an upward opening is provided in the back box 11, a connecting block 13 extending upward to the upper side of the back box 11 is slidably connected to the front and rear walls of the transmission cavity 12 up and down, a button cavity 23 with an upward opening is provided in the connecting block 13, a lifting block 27 is slidably connected to the front and rear walls of the button cavity 23 up and down, an expansion plate 31 is fixedly connected to the upper end surface of the lifting block 27, a winding wheel cavity 37 is provided in the expansion plate 31, expansion cavities 32 with symmetrical opening toward the left and right sides are provided on the left and right sides of the winding wheel cavity 37, expansion blocks 33 are slidably connected to the front and rear walls of the expansion cavities 32 left and right, a communicating cavity 36 is respectively communicated between a side wall of the expansion cavities 32 on the left and right sides adjacent to each other and the left and right side walls of the winding wheel cavity, an expansion spring 24 is fixedly connected between the lower end surface of the lifting block 27 and the lower wall of the button cavity 23, a contact switch 26 is fixedly arranged on the right wall of the button cavity 23, and a clamping rack 42 is fixedly connected to the upper end of the right end surface of the fixed rack block 25. A winding wheel shaft 41 is rotatably connected with the front and rear walls of the winding wheel cavity 37, a clamping gear 40 which can be meshed with the clamping rack 42 for transmission is fixedly connected with the outer circular surface of the winding wheel shaft 41, a winding wheel 39 which is positioned at the rear side of the clamping gear 40 is fixedly connected with the outer circular surface of the winding wheel 39, a pull rope 35 which is fixedly connected with one side end surface close to the left and right expansion blocks 33 is wound and accommodated in the outer circular surface of the winding wheel 39, the pull rope 35 penetrates through the communicating cavity 36, a thrust spring 34 is fixedly connected between one side end surface close to the left and right expansion blocks 33 and one side wall close to the left and right expansion cavities 32, the winding wheel cavity 37 is provided with a yielding cavity 38 with an upward opening in a communicating way, the left end of the upper wall of the connecting block 13 is hinged with a limiting block 28, a limiting torsion spring 29 is fixedly arranged at the hinged part of the limiting block 28 and the connecting block 13, a clutch spring 54 is fixedly connected between the upper end surface of the switching bevel gear 51 and the lower end surface of the connecting block 13, the lower side of the back box 11 is rotatably connected with an adjusting screw 16 which extends upwards into the transmission cavity 12, the lower end surface of the adjusting screw 16 is fixedly connected with a handle 17, and the adjusting screw 16 extends upwards into the adjusting block 15 and is in threaded connection with the adjusting block 15.

The left wall and the right wall of the transmission cavity 12 are vertically and slidably connected with an adjusting block 15, the upper end face of the adjusting block 15 is rotatably connected with a rotating shaft 14 fixedly connected with the lower end face of the connecting block 13, the outer circular face of the rotating shaft 14 is connected with a switching bevel gear 51 in a key mode, the upper end of the left wall of the transmission cavity 12 is rotatably connected with a fan shaft 46 extending rightwards to the right side of the back box 11, the left side of the transmission cavity 12 is provided with a bevel gear cavity 18 with a downward opening, the front wall and the rear wall of the bevel gear cavity 18 are vertically and slidably connected with a threaded connecting block 20 extending downwards to the lower side of the back box 11, the lower side of the threaded connecting block 20 is provided with a roller block 67, a spring cavity 68 with an upward opening is arranged in the roller block 67, the threaded connecting block 20 extends downwards into the spring cavity 68 and is vertically and slidably connected with the spring cavity 68, the front wall and the rear wall of the descending rack cavity 21 are connected with a descending block 22 in a vertical sliding mode, the left side of the descending rack cavity 21 is provided with an ascending cavity 62 with an upward opening, the front wall and the rear wall of the ascending cavity 62 are connected with an ascending block 63 in a vertical sliding mode, and a transmission belt cavity 56 is communicated between the right wall of the ascending cavity 62 and the left wall of the descending rack cavity 21. Descending rack 55 is fixedly connected to the left end face of descending block 22, ascending rack 64 is fixedly connected to the right end face of ascending block 63, right end face of front and back wall of transmission belt cavity 56 is rotatably connected with right gear shaft 58, right gear shaft 58 outer circular face is fixedly connected with right gear 59 capable of being meshed with descending rack 55 for transmission, left gear shaft 61 is rotatably connected to left end of front and back wall of transmission belt cavity 56, left gear shaft 61 outer circular face is fixedly connected with left gear 60 capable of being meshed with ascending rack 64 for transmission, transmission belt 57 located in front of right gear 59 and left gear 60 is dynamically connected between left gear shaft 61 and right gear shaft 58, baffle 65 is rotatably connected to front and back side end faces of ascending block 63, and baffle 66 is fixedly arranged at the hinged position of baffle 65 and ascending block 63.

The left wall of the transmission cavity 12 is fixedly provided with a bidirectional motor 45, the right end face of the bidirectional motor 45 is in power connection with the left end face of a fan shaft 46, one outer circular face of one side of the fan shaft 46, which is positioned in the transmission cavity 12, is fixedly connected with a fan bevel gear 47 capable of being in meshing transmission with a switching bevel gear 51, the right end face of the back box 11 is fixedly connected with a fan cover 49, a fan cavity 50 is formed in the fan cover 49, and the fan shaft 46 extends rightwards into the fan cavity 50 and is positioned in the outer circular face of one side of the fan cavity 50 and is fixedly connected with a. The left end face of the bidirectional motor 45 is in power connection with a bevel gear shaft 44 which extends leftwards into the bevel gear cavity 18 and is rotatably connected with the left wall of the bevel gear cavity 18, the bidirectional motor 45 can be two motors which are independent from left to right or one motor which can independently output leftwards and rightwards, left power and right power can be output, the lower side of the bevel gear shaft 44 is provided with a lifting screw 19 which extends downwards into the internal thread cavity 73 and is in threaded connection with the internal thread cavity 73, the top end of the outer circular face of the lifting screw 19 and the outer circular face of the bevel gear shaft 44 are fixedly connected with a bevel gear pair 43 which is meshed with each other, a button spring 69 is fixedly connected between the lower wall of the spring cavity 68 and the lower end face of the threaded connection block 20, a button 70 which is positioned on the right side of the button spring 69 is fixedly arranged on the lower wall of the spring cavity 68, the end faces on the front side and.

In the initial state: the electromagnet 52 and the magnet 53 are in an adsorption and attachment state to drive the switching bevel gear 51 and the fan bevel gear 47 to be in a separation state, the telescopic spring 24 pushes the lifting block 27 to be located at an upper limit position, the clamping rack 42 is meshed with the clamping gear 40 to fix the winding wheel shaft 41, the thrust spring 34 is in a tightening state, the limiting torsion spring 29 is in a loosening state to drive the limiting block 28 to be in a vertical state, the button spring 69 is in a loosening state, the descending block 22 is located at an upper limit state, the ascending block 63 is located at a lower limit state, the baffle 65 is limited to the ascending cavity 62, and the baffle torsion spring 66 is in a tightening state.

The during operation, combine figure 7, the firefighter is from the right side of back of the body case 11 with back of the body case 11 back of the body, thereby drive adjusting screw 16 through rotating handle 17 and rotate, thereby drive regulating block 15 through threaded connection and upwards or move down, thereby the position of connection adjustment expansion plate 31 through axis of rotation 14, thereby start two-way motor 45 and drive fan shaft 46 and rotate when getting into the scene of a fire, the rotation through fan shaft 46 drives the rotatory wind power of producing of fan 48 right, thereby reduce dense cigarette to the interference of firefighter, carry out dense cigarette elimination step promptly. At this time, if an object falls from the upper side, the object can firstly fall on the upper end surface of the expansion plate 31, at this time, when the object is heavy, the expansion plate 31 is pressed downwards to drive the lifting block 27 to move downwards, at this time, the expansion spring 24 is tightened, the fixed rack block 25 can extend upwards and penetrate through the abdicating cavity 38 to extend upwards to the upper side of the expansion plate 31, at this time, the expansion plate 31 moves downwards and cannot continue to move downwards due to the support of the limit block 28, at this time, the expansion plate 31 moves downwards to drive the clamping rack 42 to not continue to be meshed with the clamping gear 40 for transmission, the left and right expansion blocks 33 are pushed to extend out of the expansion cavity 32 towards the left and right sides respectively by the thrust of the thrust spring 34, at this time, the lifting block 27 moves downwards to contact with the contact switch 26, when the contact switch 26 is contacted, the electromagnet 52 does not adsorb the magnetic block 53 any more, so that the bevel gear 51 is pushed by the thrust of the, thereby drive axis of rotation 14 through the meshing transmission this moment and rotate to drive connecting block 13 and rotate, thereby drive expansion plate 31 through the rotation of connecting block 13 and rotate, thereby drive the flexible piece 33 of left and right sides and rotate the area that enlarges the protection and weigh down the thing, accomplish and weigh down the thing and block the step. Protecting injured people: the injured person is carried and placed on the upper end surface of the descending block 22, at this time, the weight of the person drives the descending block 22 to move downwards to the descending rack cavity 21, the descending rack 55 is driven to move downwards by the downward movement of the descending block 22 and is meshed with the right gear 59 to drive the right gear shaft 58 to rotate, the left gear shaft 61 is driven to rotate by the transmission of the transmission belt 57 by the rotation of the right gear shaft 58, the left gear shaft 61 is driven to rotate by the rotation of the left gear shaft 61, the ascending rack 64 is driven to move upwards by the rotation of the left gear shaft 61 by the meshed transmission to drive the ascending block 63 to move upwards to the rear side of the injured person to be used as a backrest to support the injured person, and when the ascending block 63 moves upwards to the upper side of the seat plate 74, the baffle torsion spring 66 can drive the bottom ends of the front and rear side baffles, thereby preventing the injured person from falling down to the front and back sides. Auxiliary supporting: can drive bevel gear axle 44 through two-way motor 45 and rotate when fire fighter's physical power is not enough to drive bevel gear pair 43 and begin the meshing transmission, thereby drive lifting screw 19 and rotate, thereby it drives threaded connection piece 20 downstream to pass through threaded connection through lifting screw 19's rotation, thereby the terminal surface stops the rotation of bevel gear axle 44 through two-way motor 45 after pressing button 70 under threaded connection piece 20, thereby it is supplementary to fire fighter's removal through the contact of gyro wheel 72 with ground.

To sum up, when this embodiment has the object to fall in firefighter's top, can trigger the spring and promote flexible piece and pop out to drive whole expansion plate and rotate, thereby block the thing that falls of top for the firefighter, can stretch out back and baffle automatically when rescuing injured personnel simultaneously and protect, thereby prevent that the accident of injured personnel from dropping and causing secondary damage, and can make things convenient for firefighter's action.

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.