Aircraft protective breathing equipment mounting case

Abstract

The utility model relates to the field of aircraft airborne equipment installation, and relates to an aircraft protective respiratory equipment installation box. The box cover is provided with a bandage, the bandage end is provided with upper magic tape, the lower box body is metal box body, the upper box body is the non -metal injection molding structure of high strength and excellent fire -resistant performance, and the upper box body is provided with structure mounting hole for on -the -air installation connection, the lower magic tape is equipped on the outside of the upper box body close to the box cover, and the upper magic tape and the lower magic tape can cover the box cover on the upper box body after sticking together, the inner wall of the installation box is pasted around the protective pad for buffering, the box cover long side is connected with the upper box body through the rotating shaft, the box cover can be turned up and opened upwards relative to the upper box body through the rotating shaft, the lower box body and the upper box body are provided with the protrusion around the butt joint surface, the protrusion is matched with the groove around the upper box body, and the lower box body and the upper box body are bonded as a whole by adopting structural glue. Meet the requirement that portable protective respiratory equipment is quickly used within 15s in emergency situation.

Description

Technical Field

[0001] This utility model relates to the field of aircraft airborne equipment installation, and in particular to an aircraft protective breathing equipment mounting box. Background Technology

[0002] The functional components of portable protective breathing apparatus (PPBA) for aircraft are stored in vacuum-sealed packaging bags. A suitable mounting box is needed to provide full protection, facilitate observation of the equipment's status, allow for quick opening, be lightweight, and securely and firmly connect the PBA to the aircraft cabin. Metal mounting boxes offer storage, protection, and aircraft connection, but are heavy. Non-metallic mounting boxes that fully enclose the PBA and meet fire-resistant standards offer storage and isolation protection, but typically cannot be directly connected to the aircraft and require additional metal supports for protection and fixation. The combined weight of non-metallic mounting boxes and additional metal supports is significant, and removing the PBA requires unlocking the metal supports before opening the box, making equipment removal time-consuming. Vacuum-sealed protective breathing apparatus has external dimensions of approximately 250mm × 230mm × 120mm, while the mounting box needs to be approximately 260mm × 240mm × 130mm. Using a reinforced non-metallic mounting box presents the problem of a continuously exposed non-metallic surface area exceeding 1 square foot, resulting in significant heat and smoke release within the aircraft cabin. This makes it difficult for the equipment to pass airworthiness tests for heat release and smoke density in transport aircraft. To address these issues, this invention proposes a protective breathing apparatus mounting box. Utility Model Content

[0003] Utility Model Purpose To overcome the shortcomings of existing technologies, this utility model provides a protective breathing equipment mounting box composed of a combination of metal and non-metal materials, which has the functions of isolation and protection, observation of internal status, and installation and connection. Through structural design, effective weight reduction is achieved, reducing the time required to retrieve portable protective breathing equipment in the aircraft cabin and increasing the probability of passing airworthiness verification.

[0004] Technical solution An aircraft protective breathing apparatus mounting box is characterized by comprising a lower box body 1, an upper box body 2, and a lid 3 for covering the upper box body 2; the lid 3 is provided with a strap 4, the end of which is provided with an upper Velcro 11; the lower box body 1 is a metal box body, and the upper box body 2 is a non-metallic injection-molded structure with high strength and excellent fire resistance; the upper box body 2 is provided with structural mounting holes 5 for on-board installation and connection; a lower Velcro 10 is provided on the outer side of the upper box body 2 near the lid, and the upper Velcro 11 and the lower Velcro 10, when attached, can tightly cover the lid 3 on the upper box body 2; protective pads for cushioning are pasted around the inner wall of the mounting box. The long side of the lid 3 is connected to the upper box body 2 via a rotating shaft 12. The lid 3 can be rotated upward and opened relative to the upper box body 2 via the rotating shaft 12. The lower box body 1 and the upper box body 2 have protrusions around their mating surfaces. The protrusions are adapted to the grooves around the upper box body 2. The lower box body 1 and the upper box body 2 are bonded together as one unit using structural adhesive.

[0005] Furthermore, the height ratio of the lower box 1 to the upper box 2 is 3 to 1.

[0006] Furthermore, small rubber dust plugs 9 are provided at the two mating mounting holes on the outer side of the upper box 2.

[0007] Furthermore, large rubber dust plugs 7 are provided at the two mating mounting holes on the outer side of the lower box 1.

[0008] Furthermore, the mounting hole 5 of the structure has a raised shape.

[0009] Furthermore, the lower box 1 is a one-piece structure, specifically made of aluminum alloy.

[0010] Furthermore, the non-metallic injection-molded structure is specifically polycarbonate or acrylonitrile butadiene styrene flame-retardant and impact-resistant material.

[0011] Furthermore, the strap 4 is fixed to the upper box 2 by rivets 18, with a gasket 19 in the middle.

[0012] Compared with existing technologies, the advantages of this utility model are: the designed fully enclosed mounting box is lightweight, facilitating observation of the internal condition of the protective breathing equipment; it allows for secure and stable connection and fixation of the protective breathing equipment to the aircraft structure or interior decoration without the need for additional metal mounting brackets. The mounting box has high strength and sufficient internal protection, meeting the requirements of mechanical environments such as impacts and crashes in civil aviation aircraft. The mounting box can be quickly opened with a Velcro strap, meeting the requirement of rapid access to portable protective breathing equipment within 15 seconds in emergency situations. The mounting box measures approximately 260mm × 240mm × 130mm, and the structural design ensures that the non-metallic exposed surface area is no more than 1 square foot, eliminating the need for challenging heat release and smoke density airworthiness tests when installed on civil aviation aircraft with a seating capacity of more than 20 people. Attached Figure Description

[0013] Figure 1 A schematic diagram showing the opening structure of the housing cover for aircraft protective breathing equipment.

[0014] Figure 2 A diagram showing the unfolded structure of the lower body, upper body, and lid of the aircraft protective breathing equipment mounting box.

[0015] Figure 3 A cross-sectional view of the vertical mounting holes of the aircraft protective breathing equipment mounting box.

[0016] Figure 4 Overall structural diagram of the mounting box for aircraft protective breathing equipment.

[0017] The numbers in the diagram are explained as follows: 1. Lower box body; 2. Upper box body; 3. Box cover; 4. Strap; 5. Structural mounting hole; 6. Large mating mounting hole; 7. Large dust plug; 8. Small mating mounting hole; 9. Small dust plug; 10. Lower Velcro; 11. Upper Velcro; 12. Rotating shaft; 13. Screw; 14. Concave edge A; 15. Concave edge B; 16. Mounting block; 17. Mounting shaft; 18. Rivet; 19. Washer; 20. Bottom protective pad; 21. Middle protective pad; 22. Upper protective pad; 23. Clearance hole; 24. Label; 25. Instruction diagram. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] The features and illustrative embodiments of various aspects of this utility model will now be described in detail. In the following detailed description, numerous specific details are set forth in order to provide a comprehensive understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this utility model by illustrating examples of it. This utility model is by no means limited to any specific setup and method set forth below, but covers any improvements, substitutions, and modifications to the structure, method, and device without departing from the spirit of this utility model. In the following description, well-known structures and techniques are not shown to avoid unnecessarily obscuring this utility model.

[0020] In the description of this utility model, it should be noted that the directions or positional relationships indicated by terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are based on these directions or positional relationships and are only used for the convenience of describing this utility model and simplifying the description. They should not be construed as limiting this utility model. In addition, the use of ordinal numbers (e.g., "first and second," etc.) is for distinguishing objects and is not limited to this order, and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly, encompassing both direct connection and indirect connection via an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0022] It should be noted that, where there is no conflict, the embodiments of this utility model and the features therein can be combined with each other, and the various embodiments can be referenced and cited in turn. The present utility model will now be described in detail with reference to and in conjunction with the embodiments.

[0023] Referring to the attached drawings, the aircraft protective breathing equipment mounting box of this application comprises a lower box body 1, an upper box body 2, a lid 3, and flexible straps 4. The mounting box measures approximately 260mm × 240mm × 130mm. The lower box body 1 is a metal box body, while the upper box body, approximately one-third of which is a high-strength, fire-resistant, non-metallic injection-molded structure. The continuously exposed non-metallic surface area of ​​the mounting box is no more than 1 square foot. The box body has four mounting holes 5 for onboard installation and connection structures. A large rubber dust plug 7 is installed at the large mating mounting hole 6 on the outer side of the lower box body 1, and a small rubber dust plug 9 is installed at the small mating mounting hole 8 on the outer side of the upper box body 2. Two lower Velcro straps 10 are attached to the outer side of the upper box body 2 near the lid 3. A cushioning protective pad is attached to the inside of the box. A pivot is mounted on the long side of the lid 3, connected to the upper box body 2 via a rotating shaft 12 and screws 13. The lid 3 can be rotated upwards relative to the box body via the rotating shaft 12 to open. A strap 4 is provided on each of the left and right sides of the upper surface of the lid 3. Upper Velcro straps 11 are sewn onto the straps and are fixedly connected to the lower Velcro straps 10 at the upper body 2. The straps 4 allow the protective breathing equipment mounting box lid 3 to be quickly secured to the upper body 2 of the mounting box. The mounting box lid 3 can be quickly opened via the Velcro straps 4, meeting the requirement of rapid access to portable protective breathing equipment within 15 seconds in emergency situations.

[0024] In practice, four protruding structural mounting holes 5 are provided on the mounting surface of the box body, with the structural mounting holes 5 located near the narrower side of the box body. After being installed to the aircraft structure or interior trim using fasteners, the fastener heads will not contact the vacuum-sealed protective breathing equipment inside, and will not affect the installation of the internal protective breathing equipment.

[0025] In implementation, to reduce the weight of the housing while ensuring its strength, the lower housing 1 is preferably a one-piece aluminum alloy structure. Two larger mating mounting holes 6 are provided on the outer side of the lower housing 1, coaxial with the structural mounting hole 5. The upper housing 2 is preferably made of polycarbonate / acrylonitrile butadiene styrene flame-retardant and impact-resistant material. The upper housing 2 and the corresponding structural mounting hole 5 adopt a thickened structural design. Two smaller mating mounting holes 8 are provided on the outer side of the upper housing 2, coaxial with the structural mounting hole 5. Tools can tighten the fasteners protruding from the structural mounting hole on the mounting side of the housing through these mating mounting holes. The mating mounting holes not only reduce weight but also facilitate the connection and installation of the housing with the aircraft structure.

[0026] In practice, to facilitate the interlocking of the lower box 1 and the upper box 2, a concave edge 14 is provided on the upper edge of the lower box 1. The lower edge of the upper box 2 matches and interlocks with the concave edge 14 of the lower box. Structural adhesive is used on the contact surfaces of the box bodies before interlocking. After installation, normal liquids, dust, and contaminants in the cabin cannot seep into the installation box from the interlocking edge.

[0027] In practice, the upper edge of the upper box 2 is provided with a concave edge 15, and the lower edge of the box cover can be matched and snapped into the concave edge 15 of the upper box 2. After the box cover is closed, the overall isolation and protection performance of the installation box is excellent.

[0028] In implementation, the protective pads of the mounting box include a bottom protective pad 20, a middle protective pad 21, and an upper protective pad 22. The protective pads can be made of fluffy, flame-retardant pre-oxidized fiber material. The middle protective pad 21 and the upper protective pad 22 have clearance holes 23 at the mounting box's openings. The protective pads are bonded to the box body with structural adhesive. For ease of installation, the protective pads are bonded to the upper and lower box bodies separately before assembly. The protective pads meet aircraft flame-retardant requirements and provide excellent cushioning in mechanical environments such as aircraft impacts and crashes. They protect the internally vacuum-sealed protective breathing equipment from significant mechanical stress, reducing the risk of internal structural damage.

[0029] In practice, the mounting block 16 protruding from the long side of the mounting surface of the upper box 2 is provided with screw through holes, and the mounting pivot 17 protruding from the long side of the cover 3 is provided with a rotating shaft 12 with threaded holes at both ends. The screw is securely connected to the rotating shaft 12 inside the cover 3 through the mounting block 16 protruding from the upper box 2. After connection, the cover 3 can be rotated upward relative to the upper box 2 and opened by the rotating shaft 12, so that the user does not need to find an extra place to put the cover.

[0030] In implementation, the cover 3 is preferably made of transparent, impact-resistant polycarbonate material. Rivet mounting holes are provided on both sides of the center line of the transparent cover 3. Two straps 4 with mounting holes on the cover are connected and fixed by rivets 18 and enlarged washers 19. The rivet and washer installation design on the straps 4 effectively prevents the straps from loosening. Some vacuum-sealed protective breathing equipment will have a fault indicator at the center. The symmetrical arrangement of the two straps on the transparent cover 3 allows onboard maintenance personnel and users to easily observe the fault indicator and any abnormalities in the internal vacuum-sealed packaging.

[0031] The protective breathing apparatus mounting box of this application is lightweight. During installation, the straps 4 and lid 3 are opened, and the mounting box is connected and fixed to the aircraft structure or interior trim via the mating mounting holes and structural mounting holes. The rubber plugs on the outer mating mounting holes are then plugged, and the vacuum-sealed protective breathing apparatus is placed inside the mounting box. The lid 3 is then closed, and the straps 4 on both sides of the lid are glued to the box body for secure connection. The mounting box provides a stable connection, and when the lid 3 is closed, it provides excellent full-enclosure protection for the vacuum-sealed protective breathing apparatus inside. A product label 24 can be placed in the middle of the lower Velcro 9 on the upper part of the box body 2, and there is ample space on the middle of the outer side of the lower part of the box body 1 to display the product operation instructions diagram 25. During installation, maintenance personnel can check the name, model, and expiration date of the protective breathing apparatus through the product label; the operation instructions diagram 25 and the quick-opening lid 3 on the outer side allow for convenient and rapid access to the protective breathing apparatus. Furthermore, the designed mounting box has a non-metallic continuous exposed surface area of ​​no more than 1 square foot. When installed on a civil aircraft with a passenger capacity of more than 20 people, it does not need to undergo the difficult heat release and smoke density airworthiness tests, which increases the probability of the protective breathing equipment mounting box passing airworthiness verification.

[0032] The above detailed embodiments are a description of the present utility model. It should not be considered that the specific embodiments of the present utility model are limited to these descriptions. For those skilled in the art, several simple deductions and substitutions can be made without departing from the concept of the present utility model, and all of these should be considered to fall within the protection scope of the present utility model.

Claims

1. A mounting box for aircraft protective breathing equipment, characterized in that, The device includes a lower box, an upper box, and a lid for covering the upper box. The lid has a strap with an upper Velcro fastener at the end. The lower box is made of metal, while the upper box is a high-strength, fire-resistant non-metallic injection-molded structure. The upper box has mounting holes for machine mounting. A lower Velcro fastener is located on the outer side of the upper box near the lid; when the upper and lower Velcro fasteners are attached, the lid can be securely closed onto the upper box. A cushioning pad is attached to the inner wall of the mounting box. The long side of the lid is connected to the upper box via a rotating shaft, allowing the lid to rotate upwards relative to the upper box. The mating surfaces of the lower and upper boxes have protrusions around their perimeter, which match the grooves on the upper box. The lower and upper boxes are bonded together using structural adhesive.

2. The mounting box as described in claim 1, characterized in that, The height ratio of the lower box to the upper box is 3 to 1.

3. The mounting box as described in claim 1, characterized in that, Small rubber dust plugs are installed at the two mounting holes on the outer side of the upper box.

4. The mounting box as described in claim 1, characterized in that, Large rubber dust plugs are installed at the two mounting holes on the outer side of the lower box.

5. The mounting box as described in claim 1, characterized in that, The mounting holes of the structure are in the shape of a raised structure.

6. The mounting box as described in claim 1, characterized in that, The lower box is a one-piece structure, specifically made of aluminum alloy.

7. The mounting box as described in claim 1, characterized in that, The non-metallic injection-molded structure is specifically made of polycarbonate or acrylonitrile butadiene styrene flame-retardant and impact-resistant materials.

8. The mounting box as described in claim 1, characterized in that, The straps are fixed to the upper box body by rivets, with a gasket in the middle.

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