Lifesaving and escaping oxygen supply mask for mine

Abstract

The invention relates to the technical field of protective emergency masks and oxygen supply, and discloses a mine lifesaving escape oxygen supply mask which comprises a placing box body, a door plate and a pull ring, the door plate is hinged to the middle of one side of the placing box body, the pull ring is fixedly installed in the middle of the inner wall of the door plate, and an insertion buckle is annularly connected to the middle of the pull ring. One end of each inserting buckle is in a trifurcate shape, the adjacent portion of each inserting buckle is an open cavity and is irregular, the visual panel is arranged through the containing box body, miners can conveniently and visually check the state of the face mask, the smoke sensing device and the LED display lamp are combined, a fire disaster can be found in time, the position of the face mask can be accurately indicated, and it is ensured that the miners can rapidly find and use the face mask; the mask body is attached to the face, the soft cushion mouth-nose mask is arranged, the mask is comfortable to wear and free of oppression, the oxygen supply system effectively prevents oxygen from leaking and harmful gas from entering through the design of double filter screens and a sealing gasket, breathing safety is ensured, the oxygen inhalation port and the oxygen exhalation port are separated, gas backflow is avoided, and breathing smoothness is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of protective emergency masks and oxygen supply, in particular to an oxygen supply mask for life-saving and escape in mines. Background Art

[0002] At present, when accidents such as fire, explosion, and gas outburst occur in mines, life-saving and escape oxygen masks can effectively isolate toxic and harmful gases, provide miners with breathing oxygen, and prevent suffocation and poisoning. The new mask-type self-rescuer simplifies the wearing procedure, shortens the wearing time, is more stable to wear, and is not easy to fall off, thereby improving escape efficiency. When an accident occurs in a mine, it provides respiratory protection for miners and helps them quickly escape from dangerous areas. When they cannot escape immediately, it provides temporary breathing protection for miners, prolongs their survival time, and waits for external rescue. By providing respiratory protection and escape support, it significantly reduces the casualty rate of miners in accidents.

[0003] However, in current practical applications, some self-rescuers are complicated to operate, and miners may not be able to wear and use them quickly and correctly in an emergency. Chemical oxygen self-rescuers have high oxygen supply temperature, large breathing resistance, and low wearing comfort during use. Although compressed oxygen self-rescuers have stable oxygen supply, the equipment is heavy and inconvenient to carry. Self-rescuers need to be inspected and maintained regularly to ensure that they can be used normally in an emergency. By placing the box body with a visual panel, miners can intuitively view the status of the mask. Combined with the smoke detection device and the LED display light, it can detect fire in time and accurately indicate the position of the mask, ensuring that miners can quickly find and use the mask. The mask body is made of transparent material, fits the face, and has a clear field of view, which is convenient for observing the environment and outsiders to check the user's status. It also combines functions such as fire warning, oxygen supply, harmful gas filtration and sealing adjustment, providing miners with reliable life support in emergency situations, significantly improving the escape success rate and survival time, and is an indispensable and important part of the mine safety protection system. Summary of the Invention

[0004] In order to solve the above problems, the present invention proposes a life-saving and escape oxygen supply mask for mines to more accurately solve the above problems.

[0005] The present invention is achieved through the following technical solutions:

[0006] The present invention proposes a life-saving and escape oxygen supply mask for mines, which includes a placement box body, a door panel, and a pull ring. The door panel is hinged in the middle of one side of the placement box body, and the pull ring is fixedly installed in the middle of the inner wall of the door panel. The middle part of the pull ring is connected with a buckle. One end of the buckle is trident-shaped, and the adjacent part of the buckle is an open cavity with an irregular shape. The other end of the buckle is fixedly connected to the middle part of the strap.

[0007] Furthermore, visualization panels are provided in the middle of both sides of the placement box.

[0008] Furthermore, a switch button is fixedly installed on the bottom end of one side of the placement box body, an LED display light is fixedly installed on the top end of one side of the placement box body, and a smoke detection device is fixedly installed on the middle part of the top end of the placement box body.

[0009] Furthermore, the mask body is movably installed inside the placement box body, and a placement groove is opened at the inner bottom end of the placement box body, and the groove of the placement groove is engaged with the mask body.

[0010] Furthermore, a breathing port is installed at a protruding position at the bottom end of the mask body, and a mouth and nose mask is movably installed at the inner bottom end of the mask body.

[0011] Furthermore, a first oxygen supply shell is fixedly installed on one side of the breathing port, a first filter is sleeved inside the first oxygen supply shell, and an oxygen inlet is fixedly connected to the inside of the first filter. A second oxygen supply shell is fixedly installed on the other side of the breathing port, a second oxygen supply shell is sleeved inside the second filter, and an oxygen exhalation port is fixedly connected to the inside of the second filter.

[0012] Furthermore, sealing gaskets are movably installed at the connections between the first oxygen supply shell, the second oxygen supply shell, the oxygen inlet, and the oxygen exhalation port.

[0013] Furthermore, a sealing ring is connected around the inside of the mask body, and the sealing ring is in contact with the back of the mask body.

[0014] Furthermore, length adjusting parts are movably installed around the middle part of the mask body connected to the sealing ring, and multiple length adjusting parts are connected with straps around them, and multiple connecting straps are fixedly connected to the middle part of the straps.

[0015] Furthermore, a handle is fixedly hinged at the middle portion of one outer side of the door panel.

[0016] Beneficial effects

[0017] Compared with the prior art, the present invention provides a mine rescue and escape oxygen supply mask with the following beneficial effects:

[0018] 1. This is a life-saving and escape oxygen mask for mines. The box is equipped with a visualization panel. The user can clearly see the status of the mask body placed inside without opening the box, including whether the mask is intact and whether the position is correct. It is convenient for daily inspection and quick confirmation in emergency situations. Combined with the smoke detection device and LED display light, it can detect fire in time and accurately indicate the position of the mask, ensuring that miners can quickly find and use the mask. The mask body is made of transparent material, fits the face, and has a clear field of view, which is convenient for observing the environment and for outsiders to check the user's status.

[0019] 2. This oxygen mask for life-saving escape in mines is equipped with a padded mouth and nose mask, which is comfortable to wear without feeling oppressive. The oxygen supply system is designed with double filters and sealing gaskets to effectively prevent oxygen leakage and harmful gas from entering, ensuring breathing safety. The separation design of the oxygen inlet and the oxygen exhalation port avoids gas backflow and ensures smooth breathing.

[0020] 3. This mine life-saving and escape oxygen supply mask can be flexibly adjusted according to the miner's head shape through the combination of straps and length adjustment parts to ensure sealing and comfort. Overall, it can provide miners with all-round and reliable life support in an emergency, significantly improving the miners' escape success rate and survival time. It is an indispensable and important component and guarantee in the mine safety protection system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the mask body and the nodes of the mouth and nose mask of the present invention;

[0023] Figure 3 This is a schematic diagram of the node structure on the side of the mask body of the present invention;

[0024] Figure 4 It is a front view structural schematic diagram of the present invention;

[0025] Figure 5 Schematic diagram of the explosion structure of the present invention

[0026] Figure 6 Schematic diagram of the internal structure of the sealing ring of the present invention.

[0027] Reference numerals:

[0028] 1, placing box; 2, door plate; 3, pull ring; 4, plug buckle; 5, visualization panel; 6, switch button; 7, LED display lamp; 8, smoke sensing device; 9, mask body; 10, breathing port; 11, mouth and nose cover; 12, first oxygen supply shell; 13, first filter screen; 14, oxygen inlet; 15, second oxygen supply shell; 16, second filter screen; 17, oxygen outlet; 18, gasket; 19, sealing ring; 20, length adjusting piece; 21, bandage; 22, connecting belt; 23, handle; 24, placing groove. DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0030] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0031] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0032] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be such that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the reference terms "one scheme", "some schemes", "examples", "specific examples" or "some examples" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the scheme or example are included in at least one scheme or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same scheme or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more schemes or examples.

[0034] See also Figures 1 to 6 The embodiment of the present invention proposes a life-saving and escape oxygen supply mask for mines. The life-saving and escape oxygen supply mask for mines is an important component of the mine safety protection system. When a fire occurs in a mine, a large amount of toxic smoke and an oxygen-deficient environment will be generated. The oxygen supply mask can provide miners with a continuous oxygen supply and pure oxygen through a built-in oxygen generator or a compressed oxygen cylinder. The oxygen supply mask can isolate these harmful gases, ensure the miners' breathing safety, help them evacuate safely, and prolong the survival time of trapped miners. In a dangerous environment, wearing an oxygen supply mask can bring psychological comfort to miners, reduce panic, stabilize their psychological state, and thus greatly improve the success rate of escape. In view of this, this article proposes a life-saving and escape oxygen supply mask for mines, which is intended to provide critical life support for miners in emergency situations, ensure their safe evacuation or wait for rescue.

[0035] This life-saving oxygen mask for mines has extremely sophisticated and practical structural features. It includes a placement box body 1, a door panel 2, and a pull ring 3. The placement box body 1 of the life-saving oxygen mask for mines is the core storage and protection unit of the device. The design takes the working environment of the mine into consideration. The placement box body 1 is made of strong materials and can withstand accidental impacts such as equipment collisions in the mine environment. It also has corrosion resistance, thereby ensuring that the placement box body 1 always maintains structural integrity during long-term use and provides reliable protection for the internal mask body 9. A door panel 2 is hinged in the middle of one side of the placement box body 1, so that the door panel 2 is firmly closed when not in use. The edge is equipped with a sealing strip, which can effectively block dust, coal powder and other debris in the mine from entering the placement box body 1, preventing these impurities from contaminating or damaging the internal mask body 9, ensuring that the mask can be used normally in an emergency. A pull ring 3 is fixedly installed in the middle of the inner wall of the door panel 2. The middle part of 3 is connected to a rope with a buckle 4. The buckle 4 is divided into a male buckle and a female buckle. The male buckle is usually a structure with a protruding part and is in the shape of a trident. Its design purpose is to be able to be easily inserted into the female buckle. A claw is provided on the male buckle. These structures can cooperate with the locking structure in the female buckle after being inserted into the female buckle to achieve a locking function. One end of the male buckle is fixedly installed inside the pull ring 3. The female buckle is a hollow structure with a space for accommodating the male buckle. Its shape matches the male buckle. It is usually an open cavity with an irregular shape. There is a structure inside the female buckle that cooperates with the male buckle locking device, with grooves and card slots. When the male buckle is inserted into the female buckle, the locking structure in the female buckle will clamp the locking device of the male buckle, thereby achieving fixation. The female buckle is fixedly connected to the middle part of the strap 21 through a high-strength connection method, providing an important connection guarantee for the wearing and use of the mask.

[0036] A visual panel 5 is provided in the middle of both sides of the placement box body 1, so that the user can clearly see the status of the mask body 9 placed inside without opening the placement box body 1, including information such as whether the mask is intact and whether the position is correct, which is convenient for daily inspection and quick confirmation in emergency situations. A switch button 6 is fixedly installed at the bottom end of one side of the placement box body 1. When the switch button 6 is pressed, the door panel 2 can be opened, and the internal mechanical transmission mechanism will move quickly to unlock the door panel 2 so that it can be opened smoothly. An LED display light 7 is fixedly installed at the top of one side of the placement box body 1. The LED display light 7 has the advantages of high brightness, low energy consumption, and long life.

[0037] A smoke detector 8 is fixedly installed in the middle of the top of the box body 1. Since smoke rises and reaches the bottom of the ceiling, when smoke enters the ionization chamber inside the smoke detector 8, this balance relationship will be destroyed. When the alarm circuit detects that the concentration exceeds the set threshold, an alarm will be issued. The smoke alarm detects fire through smoke. When the miners do not see the flames or smell the smoke, the smoke detector 8 can detect it and trigger the alarm, so that the LED display light 7 emits a strong light at the same time, which can prompt the miners to take protective measures in time before they notice any signs of fire, ensuring that the miners can quickly, promptly and accurately find the location of the oxygen mask in an emergency, thereby buying precious time for taking protective measures.

[0038] The mask body 9 is movably installed inside the placement box body 1. The mask body 9 is the core component of the entire oxygen supply mask. A placement groove 24 is provided at the bottom end of the inner part of the placement box body 1. The groove of the placement groove 24 is engaged with the mask body 9 for firmly engaging the mask body 9. The shape and size of the placement groove 24 are precisely matched with the mask body 9 to ensure that the mask body 9 will not become loose or damaged during storage and transportation. When the oxygen supply mask needs to be used, the miner only needs to press the switch button 6 at the bottom end of one side of the placement box body 1 and pull the handle 23 to quickly open the placement box body 1, take out the mask body 9, and at the same time open the buckle 4 from the pull ring 3 and the connecting belt 22.

[0039] The curvature of the mask body 9 can better fit the facial contour of the user. It is the main body of the oxygen supply mask and is used to cover the entire face of the user. The transparent material used has high light transmittance and good wear resistance, which is convenient for the user to clearly see the environment in front, observe the surrounding situation, and make correct escape judgments. At the same time, it is also beneficial for external personnel to better observe the user's situation and status, and timely grasp their vital signs and actions. A breathing port 10 is installed at the protruding position of the bottom end of the mask body 9, and an oronasal mask 11 is movably installed at the inner bottom end of the mask body 9. The oronasal mask 11 is made of soft and elastic silicone material, which can fit tightly to the user's nasal cavity and oral cavity, providing a comfortable wearing experience, and will not cause a sense of oppression on the miner's face. Even if worn for a long time, it will not cause oppression on the miner's face, effectively ensuring the comfort and safety of the miner during the escape process.

[0040] A first oxygen supply housing 12 is fixedly installed on one side of the breathing port 10, and a first filter 13 is sleeved inside the first oxygen supply housing 12. The first filter 13 is fixedly connected to the oxygen inlet 14. A second oxygen supply housing 15 is fixedly installed on the other side of the breathing port 10. The second oxygen supply housing 15 is sleeved inside with a second filter 16. The second filter 16 is fixedly connected to the oxygen exhalation port 17. The first filter 13 and the second filter 16 are usually made of porous materials, such as activated carbon. Activated carbon has an extremely high specific surface area and microporous structure, which can absorb harmful molecules in the gas. When harmful gases pass through the filter, the gas molecules will be adsorbed onto the microporous surface of the activated carbon, thereby reducing the harmful components in the gas. In the toxic smoke produced by mine fires, harmful gases such as carbon monoxide and hydrogen sulfide will be adsorbed by the activated carbon, thereby reducing their concentration and preventing harmful gas molecules from entering the respiratory tract of miners. At the same time, the design of the first filter 13 and the second filter 16 can also block particulate matter, reduce irritation to the respiratory system, and also reduce the impact of particulate matter on gas filtration efficiency, thereby protecting the lung health of miners and reducing the impact of particulate matter on gas filtration efficiency, thereby extending the service life of the filter.

[0041] The connections between the first oxygen supply shell 12, the second oxygen supply shell 15 and the oxygen inhalation port 14 and the oxygen exhalation port 17 are all movably installed with sealing gaskets 18. The sealing gaskets 18 are disc-shaped and have high elasticity. When installed, the sealing gaskets 18 can be appropriately squeezed to cause elastic deformation, which can tightly fill the gaps in the connections, thereby ensuring the sealing of the connections between the mask body 9 and the oxygen supply inhalation and exhalation parts, effectively preventing oxygen leakage, and at the same time blocking external harmful gases from entering the mask body 9, ensuring the stability and safety of the oxygen inside the mask body 9. The oxygen inhalation port 14 is set on one side of the mask body 9. The oxygen inhalation port 14 is for oxygen inhalation into the mask, and the other oxygen exhalation port 17 is for carbon dioxide exhalation out of the mask. This separate design can effectively prevent gas backflow and ensure smooth and safe breathing for the user.

[0042] A sealing ring 19 is connected to the inside of the mask body 9, and the sealing ring 19 is fitted with the back of the mask body 9. The sealing ring 19 is also made of silicone material, which has good elasticity and fit. The sealing ring 19 fits tightly with the back of the mask body 9 and can completely cover the contact area between the face and the mask, forming a sealed space, which effectively prevents the infiltration of harmful gases from the outside.

[0043] Length adjustment parts 20 are movably installed around the middle part where the mask body 9 is connected to the sealing ring 19. The length adjustment parts 20 adopt an adjustable plastic buckle structure. The length and width of the length adjustment parts 20 can be flexibly adjusted according to the user's head size and wearing needs. Multiple length adjustment parts 20 are surrounded by a strap 21. The strap 21 has good wear resistance and comfort. Multiple connecting straps 22 are fixedly connected at the middle position of the multiple straps 21. The connecting straps 22 also have a certain elasticity and can further adjust the position of the mask body 9 and the tension of the straps 21. Through the synergistic effect of these components, the user can conveniently adjust the position of the mask body 9 and the tightness of the straps 21 and the connecting straps 22 according to his own head shape and actual needs, ensuring that the mask body 9 is firmly worn on the face while maintaining a comfortable wearing feeling. Even during strenuous exercise or emergency escape, the mask will not fall off or shift, always providing reliable respiratory protection for miners.

[0044] A handle 23 is fixedly hinged in the middle of one side of the outer side of the door panel 2. In an emergency such as a mine fire, the smoke sensor 8 first detects that the smoke concentration exceeds the standard, triggers the alarm and lights up the LED display light 7, and quickly attracts the attention of the miners with dual sound and light signals. The miners quickly find the placement box 1 according to the strong light indication of the LED display light 7, and then press the switch buttons 6 at the upper and lower ends of the placement box 1, and pull the handle 23 at the same time to open the placement box 1, unfasten the buckle 4, and take out the mask body 9. When wearing it, the miners fit the mask body 9 to the face and ensure the sealing by adjusting the length adjustment piece 20 and the strap 21 to form a good sealing effect.

[0045] In addition, the oxygen in the mask body 9 enters through the oxygen inlet 14 and is filtered through the first filter 13 to provide miners with pure and safe breathing oxygen. The exhaled carbon dioxide is discharged through the oxygen exhalation port 17 and filtered through the second filter 16 to prevent the backflow of harmful gases. The entire oxygen supply system is ensured to be sealed by the sealing gasket 18 and the sealing ring 19, ensuring the safe and smooth breathing of miners in dangerous environments lacking oxygen and filled with harmful gases.

[0046] In summary, the various components of this mine rescue and escape oxygen mask work together to build an efficient life support system. By equipping both sides of the box body 1 with a visual panel 5, users can intuitively and clearly view the current status of the mask inside the box body 1. In addition, the oxygen mask is also combined with a smoke detector 8 and an LED display light 7. This allows the location of the mask to be discovered and accurately indicated in an emergency such as a fire, ensuring that miners can quickly find and use the mask. The mask body 9 is made of transparent material and fits the face, which not only meets the user's need to clearly observe the surrounding environment, but also facilitates outsiders to observe the user's status in a timely and convenient manner. It is also equipped with a padded mouth and nose mask 11, which is comfortable to wear without feeling oppressive. The oxygen supply system is designed with a double filter and a sealing gasket 18 to effectively prevent oxygen leakage and the entry of harmful gases, ensuring the breathing safety of miners. The separate design of the oxygen inlet 14 and the oxygen exhalation outlet 17 effectively avoids the problem of gas backflow, further ensuring the smooth and safe breathing of miners during use.

[0047] The combination of the strap 21 and the length adjustment piece 20 can be flexibly adjusted according to the miner's head shape to ensure sealing and comfort. Overall, the device combines functions such as fire warning, oxygen supply, harmful gas filtration and sealing adjustment, and can provide miners with all-round and reliable life support in emergency situations, significantly improving the miners' escape success rate and survival time. It is an indispensable and important component and guarantee in the mine safety protection system.

[0048] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A life-saving oxygen supply mask for mine escape, comprising a housing (1), a door panel (2), and a pull ring (3), characterized in that: A door panel (2) is hingedly connected to the middle of one side of the placement box body (1), a pull ring (3) is fixedly installed to the middle of the inner wall of the door panel (2), and a buckle (4) is connected to the middle of the pull ring (3), one end of the buckle (4) is in a trident shape, and the adjacent part of the buckle (4) is an open cavity with an irregular shape, and the other end of the buckle (4) is fixedly connected to the middle of the strap (21).

2. The mine rescue and escape oxygen supply mask according to claim 1, characterized in that: Visual panels (5) are provided in the middle of both sides of the placement box body (1).

3. The mine rescue and escape oxygen supply mask according to claim 1, characterized in that: A switch button (6) is fixedly mounted on the bottom end of one side of the placement box body (1), an LED display light (7) is fixedly mounted on the top end of one side of the placement box body (1), and a smoke sensor (8) is fixedly mounted on the middle portion of the top end of the placement box body (1).

4. The mine rescue and escape oxygen supply mask according to claim 1, characterized in that: The mask body (9) is movably mounted inside the placement box body (1), and a placement groove (24) is provided at the bottom end of the placement box body (1), and the groove of the placement groove (24) is engaged with the mask body (9).

5. The mine rescue and escape oxygen supply mask according to claim 4, characterized in that: A breathing port (10) is installed at a protruding position at the bottom end of the mask body (9), and a mouth and nose mask (11) is movably installed at the inner bottom end of the mask body (9).

6. The mine rescue and escape oxygen supply mask according to claim 5, characterized in that: A first oxygen supply housing (12) is fixedly mounted on one side of the breathing port (10), a first filter (13) is sleeved inside the first oxygen supply housing (12), an oxygen inlet (14) is fixedly connected to the inside of the first filter (13), a second oxygen supply housing (15) is fixedly mounted on the other side of the breathing port (10), a second filter (16) is sleeved inside the second oxygen supply housing (15), and an oxygen exhalation port (17) is fixedly connected to the inside of the second filter (16).

7. The mine rescue and escape oxygen supply mask according to claim 6, characterized in that: Sealing gaskets (18) are movably installed at the connections between the first oxygen supply shell (12), the second oxygen supply shell (15), the oxygen inlet (14), and the oxygen exhalation outlet (17).

8. The mine rescue and escape oxygen supply mask according to claim 4, characterized in that: A sealing ring (19) is connected around the inside of the mask body (9), and the sealing ring (19) is in contact with the back of the mask body (9).

9. The mine rescue and escape oxygen supply mask according to claim 4, characterized in that: Length adjusting members (20) are movably installed around the middle of the mask body (9) where it is connected to the sealing ring (19), and a plurality of the length adjusting members (20) are connected around a strap (21), and a plurality of connecting straps (22) are fixedly connected to the middle of the strap (21).

10. The mine rescue and escape oxygen supply mask according to claim 1, characterized in that: A handle (23) is fixedly hinged at the middle portion of one outer side of the door panel (2).

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