Aircraft passenger seat belt non-usage detection reminder device and control method

Abstract

The application discloses an aircraft passenger cabin seat safety belt unfastening detection reminding device and a control method thereof. The device comprises a lock tongue assembly connected with a lock buckle assembly. The lock tongue assembly comprises a lock tongue fixed at the front end of the shell of the lock tongue assembly and used for being inserted into the lock buckle assembly; a sliding block connected with the inside of the shell of the lock tongue assembly and moving between a first position, a second position and a third position; a pin fixed at the tail end of the shell of the lock tongue assembly; a contact piece moving together with the sliding block and just contacting with the pin when the sliding block reaches the second position; an elastic piece arranged between the sliding block and the pin; a cable connected with the two pins and conducting when the contact piece contacts with the pin; and a detection device used for detecting whether the cable is conducted to indicate whether the safety belt is fastened. The application can detect whether the safety belt is fastened, keep the original waistband length from being lengthened and change the passenger using habit, and is suitable for the scene of many seats and dense personnel on the aircraft.

Description

Technical Field

[0001] This invention belongs to the technical field of seat belts, and particularly relates to an aircraft cabin seat seat belt unfastened detection and reminder device and its control method. Background Technology

[0002] Seatbelt unfastened system detection and reminder devices are very mature. The principle is to use a pressure sensor under the seat to detect whether there is a passenger in the seat, and a Hall sensor in the seatbelt buckle to detect whether the seatbelt latch is inserted. When the system detects that there is a passenger in the seat and the latch is not inserted, the reminder device will display a seatbelt unfastened sign and make an audible reminder to the passenger to fasten the seatbelt.

[0003] In the aviation industry, the seat belts for aircraft seats are hip belts that are fastened around the passenger's waist and legs. Current aircraft seats also have seat belt fastening reminder signs above them.

[0004] Current seatbelt devices and their functions in the aviation industry are too rudimentary. Laparoscopic seatbelts only provide tightening protection and lack any additional functions. The markings above the seats are merely reminders and cannot detect whether passengers are actually wearing seatbelts. Flight attendants also cannot promptly determine whether passengers' seatbelts are fastened. Flight attendants must check and remind each passenger to fasten their seatbelts individually.

[0005] The audible reminder for passengers not fastening their seatbelts is only suitable for scenarios with fewer seats. In scenarios like airplanes with many seats and dense crowds, the audible reminder cannot effectively help flight attendants quickly and accurately locate passengers who are not fastening their seatbelts. Furthermore, excessive noise can easily disturb passengers who have already fastened their seatbelts. Summary of the Invention

[0006] Based on the shortcomings of the prior art, the technical problem solved by the present invention is to provide an aircraft cabin seat seat belt unfastened detection and reminder device and its control method, which plays the role of detecting whether the seat belt is fastened, keeping the original lap belt length without lengthening and without changing the passenger's usage habits. It is suitable for aircraft, a scenario with a large number of seats and dense seating, and solves the problems of sound prompts disturbing others and being unable to quickly and accurately locate the seat belt.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: The present invention provides an aircraft cabin seatbelt unfastened detection and reminder device, including a latch assembly that is mated with a buckle assembly. The latch assembly includes: a latch, fixed to the front end of the latch assembly's housing for insertion into the buckle assembly; and a slider, slidably connected inside the latch assembly's housing and moving between a first position, a second position, and a third position. Normally, the slider is located in the first position. When the latch is inserted into the buckle assembly, the slider moves towards the rear end under the thrust of the housings on both sides of the buckle assembly, causing the slider to move from the first position to the third position. Two pins are fixed to the tail end of the latch assembly housing; a contact element moves with the slider, and when the slider reaches the second position, the contact element just contacts the two pins; an elastic element is disposed between the slider and the pins, used to ensure that the contact element and the two pins are in flexible contact when the slider moves from the second position to the third position, and to push the slider from the third position back to the first position when the latch disengages from the locking assembly; a cable is connected to the two pins, and the cable is conductive when the contact element contacts the two pins; a detection device is used to detect whether the cable is conductive to indicate whether the seat belt is fastened.

[0008] Therefore, this invention proposes a device located on the latch side of the hip belt on an aircraft, which serves to detect whether the seat belt is fastened, while maintaining the original belt length without increasing it or changing the passenger's usage habits.

[0009] Furthermore, it also includes pressure sensors and reminder devices for sensing whether there is someone in the seat; the reminder device includes a silent reminder device, which includes a seat back screen or reading projection light, for silently transmitting the information that the seat belt is not fastened, based on the pressure information detected by the pressure sensor.

[0010] Furthermore, the elastic element includes a first elastic element for pushing the slider back from the third position to the first position, a second elastic element for bringing the contact element and the two pins into a flexible contact state.

[0011] Furthermore, the second elastic element is located between the slider and the contact element. The slider has a protruding I-shaped foot at the middle of its tail end, and the contact element is U-shaped and hangs on the I-shaped foot. During the process of the slider moving from the second position to the third position, the slider continues to retract, and the I-shaped foot at the tail end of the slider disengages from the contact element. The contact element no longer moves further and maintains flexible contact with the pin under the elastic force of the second elastic element.

[0012] Optionally, the second elastic element is located at the front end of the pin, making the pin a compressible structure, and the contact element is square and fixed to the tail end of the slider; during the process of the slider moving from the second position to the third position, the contact element compresses the pin and maintains flexible contact with the pin.

[0013] Optionally, the outer shell of the latch assembly is composed of a latch top cover and a latch bottom cover that are interlocked. The front end of the latch top cover has a large cylindrical groove in the middle and three small cylindrical grooves evenly distributed around the large cylindrical groove. The front end of the latch bottom cover has a large cylinder in the middle and three small cylinders evenly distributed around the large cylinder. The rear end of the latch has a large circular hole and three small circular holes evenly distributed around the large circular hole. The large cylinder and small cylinders of the latch bottom cover pass through the large circular hole and small circular hole of the latch respectively and are inserted into the large cylindrical groove and small cylindrical groove of the latch top cover.

[0014] Furthermore, the front ends of the upper and lower covers of the latch have forward-protruding structures on both sides to protect the slider and prevent it from being accidentally touched.

[0015] Optionally, a groove is formed in the middle of the front end of the upper cover and the lower cover of the latch tongue for the housings on both sides of the latch assembly to extend into; when the housings on both sides of the latch assembly extend into the bottom of the groove, the slider is pushed to the third position.

[0016] Optionally, when the front end of the slider retracts to coincide with the bottom of the groove at the front end of the upper and lower covers of the latch, the I-shaped foot at the tail end of the slider has a certain gap with the bottom of the U-shaped groove of the contact member.

[0017] The present invention also discloses a control method for an aircraft cabin seat unfastened detection and reminder device, the steps of which are as follows:

[0018] S1. Detects whether there is someone in the seat using a pressure sensor;

[0019] S2. Identify whether the seatbelt is fastened by checking whether the contact element and the pin are in contact and separating.

[0020] S3. The seat information collector collects the pressure and fastening information on the seat and transmits it along with the corresponding seat number to the cabin data processor.

[0021] S4, the cabin data processor aggregates and processes the data from each seat information collector and then transmits it to the cabin crew terminal display.

[0022] S5. Flight attendants can obtain real-time information on whether passengers are wearing seat belts based on the content displayed on the flight attendant terminal display.

[0023] S6. Passengers should fasten their seat belts themselves according to the reminders from the reminder device or the crew.

[0024] Based on the above, this invention proposes a control method for a seatbelt unfastened detection and reminder device specifically for aircraft scenarios. This reminder system makes full use of the equipment currently available on aircraft. Addressing the limitations of current mainstream audio reminder technologies, a new reminder scheme is proposed, suitable for scenarios like airplanes with numerous and densely packed seats, solving problems such as audio reminders disturbing others and the inability to quickly and accurately locate the source of the problem.

[0025] Furthermore, this invention makes aircraft seat belts intelligent. Flight attendants can see in real time whether each passenger's seat belt is fastened through the cabin crew terminal display, and can quickly locate passengers who are not fastening their seat belts through seat back screens and light projections, effectively reducing the workload of flight attendants. Passengers will also fasten their seat belts in a timely manner based on the seat back screens, light projections, and reminders from flight attendants, increasing passenger safety. The way passengers fasten their seat belts remains the same as before, without requiring changes to passengers' existing habits. Introducing light projections into the aircraft's notification system avoids the shortcomings of audio prompts and increases the technological feel of the cabin. This invention makes full use of existing aircraft equipment to control aircraft weight gain.

[0026] In summary, the aircraft cabin seatbelt unfastened detection and reminder device and its control method of the present invention have at least the following beneficial effects:

[0027] 1. This invention places the seatbelt unfastened detection device on the latch side, which, compared to the current automotive solution where it is located on the buckle side, offers the advantages of a simpler and more compact structure. Compared to current aircraft seatbelts, only the latch side needs modification, resulting in minimal alterations. Furthermore, since the usage of the latch and buckle components remains unchanged, it does not affect the current usage habits of aircraft passengers. The internal sliding travel of the latch assembly is divided into two segments; this two-segment design ensures the reliability of the cable connection.

[0028] 2. This invention further develops the functions of existing facilities commonly found in aircraft, such as seatback screens and reading lights, and applies them to the prompting system, minimizing the need for additional equipment on the aircraft.

[0029] 3. This invention applies light projection technology to reminders such as seat belt not being fastened. Compared with the current mainstream sound reminders, it has the advantages of not disturbing others, accurate and eye-catching positioning, strong sense of technology, and strong scalability.

[0030] 4. This invention will make seatbelt reminders more timely, increasing passenger safety.

[0031] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, the following detailed description is provided in conjunction with preferred embodiments and accompanying drawings. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0033] Figure 1 This is an exploded view of the latch assembly of the present invention;

[0034] Figure 2 This is a schematic diagram of the assembly of the latch assembly of the present invention (the safety belt on the latch side and the latch cover are hidden for easy observation).

[0035] Figure 3 This is a schematic diagram of a seatbelt assembly consisting of a buckle assembly and a latch assembly;

[0036] Figure 4 This is a schematic diagram showing the orientation of the latch assembly of the present invention;

[0037] Figure 5 This is a schematic diagram of the structure of the locking tongue cover of the present invention;

[0038] Figure 6 This is a schematic diagram of the first stroke of the slider (moving from the first position to the second position). (For ease of observation, the LIFT cover of the latch assembly, the upper cover of the latch assembly, and the safety belt on the side of the latch are hidden.)

[0039] Figure 7 This is a schematic diagram of the second stroke of the slider (moving from the second position to the third position). (For ease of observation, the LIFT cover of the latch assembly, the upper cover of the latch assembly, and the safety belt on the side of the latch are hidden.)

[0040] Figure 8 This is a schematic diagram of the compressible pin structure of the present invention;

[0041] Figure 9 This is a schematic diagram showing the fit between the compressible pin and the contact.

[0042] Figure 10 This is a schematic diagram showing the latch assembly and the latch assembly before they are engaged.

[0043] Figure 11 This is a schematic diagram showing the latch assembly and the latch assembly engaging in place.

[0044] Figure 12This is a schematic diagram of the control method for the aircraft cabin seat unfastened detection and reminder device of the present invention;

[0045] Figure 13 This is a diagram illustrating the chair back reminder.

[0046] Figure 14 This is a schematic diagram of the overall lighting projection.

[0047] Figure 15 This is a schematic diagram of a light projection reminder pattern;

[0048] Figure 16 A diagram showing the projection lamp viewed from below;

[0049] Figure 17 This is a cross-sectional diagram of a reading projector lamp. Detailed Implementation

[0050] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this specification. These embodiments illustrate the principles of the invention, and other aspects, features, and advantages of the invention will become apparent from this detailed description. In the accompanying drawings, the same or similar parts in different figures are indicated by the same reference numerals.

[0051] like Figures 1 to 17 As shown, the aircraft cabin seatbelt unfastened detection and reminder device of the present invention includes a latch assembly 100 that is mated and connected to the latch assembly 200. The latch assembly 100 includes a latch 110, a latch bottom cover 120, a latch top cover 130, a slider 140, a contact member 150, an elastic member, a pin 170, a pin support member 180, a latch side seatbelt 300, and a reminder device. The latch 110 is fixed to the front end of the housing of the latch assembly 100 and is used to insert into the latch assembly 200, serving a connecting function. The latch assembly 200 is the same as the existing seatbelt latch assembly in aircraft; its specific structure is not described in this invention.

[0052] The upper cover 130 and the lower cover 120 of the latch bolt interlock to form the outer shell of the latch bolt assembly 100. The upper cover 130 has a large cylindrical groove 131 at the center of its front end and three small cylindrical grooves 132 evenly distributed around the large cylindrical groove 131. The lower cover 120 has a large cylindrical groove 121 at the center of its front end and three small cylindrical grooves 122 evenly distributed around the large cylindrical groove 121. The tail end of the latch bolt 110 has a large circular hole 111 and three small circular holes 112 evenly distributed around the large circular hole 111. The large cylindrical groove 121 and the small cylindrical grooves 122 of the lower cover 120 pass through the large circular hole 111 and the small circular hole 112 of the latch bolt 110, respectively, and are inserted into the large cylindrical groove 131 and the small cylindrical groove 132 of the upper cover 130. The large round hole 111 of the latch 110 mates with the large cylinder 121 on the latch bottom cover 120 to withstand the tension of the seat belt. The three small round holes 112 of the latch 110 mate with the three small cylinders 122 on the latch bottom cover 120 to provide positioning and prevent the latch 110 from rotating. The latch bottom cover 120 and the latch top cover 130 together form the outer shell of the latch assembly. The cylinders on the latch bottom cover 120 pass through the round holes on the latch 110 and are finally inserted into the cylindrical slots of the latch top cover 130. The cylindrical slots of the latch top cover 130 and the cylinders of the latch bottom cover 120 serve to provide positioning and structural reinforcement.

[0053] The slider 140 is slidably connected inside the housing of the latch assembly 100 and moves between the first position, the second position and the third position. The slider 140 is normally located in the first position. When the latch 110 is inserted into the latch assembly 200, the slider 140 moves towards the tail end under the thrust of the housing on both sides of the latch assembly, thereby causing the relevant structure inside the latch assembly 100 to move and displace, and causing the slider 140 to move from the first position to the third position.

[0054] Two pins 170 are fixed to the tail end of the latch assembly housing via pin supports 180, which provide support for the two pins 170. The tail end of the pin 170 connects to the cable 400 of the seat information collector, and the cable 400 is conductive when its front end connects to the contact 150, indicating that the seat belt is fastened. The cable 400 is connected to the two pins 170, and the cable 400 is conductive when the two pins 170 are connected. In addition, to protect the cable 400 and prevent excessive bending and wear, a cable protective sleeve 410 is provided on the cable 400.

[0055] Additionally, the tail end of the latch bottom cover 120 is provided with a waist-shaped hole 123 that connects to the latch side safety belt 300. A racetrack-shaped cable groove is provided around the waist-shaped hole 123 for cable routing. A cable outlet is also provided in the center of the tail end of the latch bottom cover 120 for the cable to pass through. Correspondingly, the tail end of the latch top cover 130 is also provided with a waist-shaped hole and racetrack-shaped cable grooves distributed around the waist-shaped hole, and a cable outlet is also provided in the center of its tail end. The front end of the latch side safety belt 300 connects to the waist-shaped hole at the tail ends of the latch top cover 130 and the latch bottom cover 120, bearing tensile force. The latch side safety belt 300 has a double-layer structure, with closed edges on both sides and a hollow structure in the middle for cable routing.

[0056] Contact 150 moves together with slider 140. When slider 140 reaches the second position, contact 150 makes contact with the two pins 170 and conducts the cable 400.

[0057] An elastic element is disposed between the slider 140 and the pins 170 to ensure that the contact element 150 and the two pins 170 are in flexible contact when the slider 140 moves from the second position to the third position, and to push the slider 140 back from the third position to the first position when the latch 110 disengages from the latch assembly 200.

[0058] In this invention, the elastic element includes a first elastic element 161 for pushing the slider 140 from the third position back to the first position, and a second elastic element for bringing the contact element 150 and the two pins 170 into a flexible contact state.

[0059] In one embodiment, the second elastic element 162 is located between the slider 140 and the contact element 150. The slider 140 has a protruding H-shaped foot at its tail end. The contact element 150 is U-shaped and hangs on the H-shaped foot. When the slider 140 moves from the third position to the first position, it will drive the contact element 150 to reset, preventing the contact element 150 from remaining in contact with the pin 170 and ensuring that the cable 400 remains in a conductive state. It also prevents accidental contact between the contact element 150 and the pin 170 when the latch 110 is not inserted into the locking assembly 200. The tail end of the H-shaped foot is located within the U-shaped groove of the contact element 150 and has room to move within the U-shaped groove. The slider 140 slides inside the lock tongue assembly housing via a groove formed by the upper lock tongue cover 130 and the lower lock tongue cover 120. Two first spindles 141 are disposed on both sides of the inside of the lock tongue assembly housing. The slider 140 has blind holes on both sides for the insertion of the first spindles 141. A first elastic element 161 is sleeved on the first spindles 141. The contact element 150 slides inside the lock tongue assembly housing guided by the second spindles 151. Two second spindles 151 are located between the two first spindles 141. The contact element 150 has through holes on both sides for the second spindles 151 to pass through, so that a sliding connection is formed between the contact element 150 and the second spindles 151. The first elastic element 161 and the second elastic element 162 are both springs and are respectively sleeved on the first spindles 141 and the second spindle 151. The first spindle 141 and the second spindle 151 serve to constrain the spring, and the second elastic element 162 also serves to constrain the movement of the contact element 150, so that the contact element 150 keeps pressing the pin 170 and maintains a flexible contact between the two.

[0060] As slider 140 moves from the first position to the second position, contact 150 retracts under the push of the second elastic element 162 and the constraint of the second spindle 151 until it contacts the two pins 170, connecting the cable 400. As slider 140 moves from the second position to the third position, slider 140 continues to retract, and the I-beam at the tail end of slider 140 disengages from contact 150. Contact 150 no longer moves further and maintains good flexible contact with pins 170 under the elastic force of the second elastic element 162.

[0061] The first elastic element 161 provides energy storage and pushes the slider 140 to rebound. The second elastic element 162 pushes the contact element 150 to move. The two intermediate second elastic elements 162 also apply a certain pressure to the contact element 150, so that the contact element 150 and the pin 170 can maintain good flexible contact.

[0062] In this invention, the front ends of the upper cover 130 and the lower cover 120 of the latch have forward-protruding structures on both sides. During the insertion of the latch 110 into the latch assembly 200, the housings on both sides of the latch assembly are located inside the two protruding structures. The protruding structures do not affect the pushing action of the housings on both sides of the latch assembly on the slider 140. The protruding structures serve to protect the slider 140 and prevent accidental activation.

[0063] Additionally, a groove 101 is formed in the middle of the front end of the latch upper cover 130 and the latch bottom cover 120, allowing the housings on both sides of the latch assembly to extend into it. When the housings on both sides of the latch assembly extend to the bottom of the groove 101, the slider 140 is pushed to the third position. When the front end of the slider 140 retracts to coincide with the bottom of the groove at the front end of the latch upper cover 130 and the latch bottom cover 120, that is, when the slider 140 is in the third position, the I-shaped foot at the tail end of the slider 140 has a certain gap with the bottom of the U-shaped groove of the contact member 150 to ensure flexible contact between the contact member 150 and the pin 170.

[0064] In the above embodiment, when the latch 110 of the latch assembly 100 is inserted into the latch assembly 200, the housings on both sides of the latch assembly push the slider 140 backward. At this time, the first elastic members 161 on both sides inside the latch assembly 100 begin to store force, and the second elastic member 162 in the middle pushes the contact member 150 backward together until the contact member 150 contacts the two pins 170, and the two cables 400 are connected. The time from the slider 140 to the point where the contact member 150 just contacts the pin is defined as the "first stroke".

[0065] After the first stroke is completed, the housings on both sides of the latch assembly push the slider 140 to continue retracting. At this time, the contact 150 stops moving under the reaction force of the pin 170, and the I-shaped foot at the tail end of the slider 140 disengages from the contact 150. The two second elastic elements 162 in the middle begin to accumulate force. Under the elastic force of these two second elastic elements 162, the contact 150 and the pin 170 are firmly joined together. When the front end of the slider 140 retracts to coincide with the groove 101 at the front end of the latch upper cover 130 and the latch bottom cover 120, the latch 110 is successfully engaged in the latch assembly 200. The period from the end of the first stroke to the successful engagement of the latch 110 in the latch assembly 200 is defined as the "second stroke".

[0066] It should be noted that the purpose of adding a second stroke in this invention is to change the connection between the contact 150 and the pin 170 from a rigid connection to a flexible connection. In this way, after the latch 110 successfully engages with the latch assembly 200, even if there is a small amount of relative movement between the latch 100 and the latch assembly 200, the contact 150 and the pin 170 will not disengage. This two-stage stroke method is not limited to the above example and can also be implemented in other forms, such as designing the pin as a compressible structure to directly participate in completing the second stroke.

[0067] In another embodiment, a second elastic element is located at the front end of pin 170, making the pin a compressible structure. Contact 150 is square and fixed to the rear end of slider 140, remaining in contact with slider 140 throughout its movement. As slider 140 moves from the second position to the third position, contact 150 compresses pin 170 and maintains flexible contact with it. By using a compressible pin, once contact 150 is in position, the pin is in a compressed state, ensuring that the continuity of cable 400 is not affected even if there is displacement between latch 110 and latch assembly 200.

[0068] This invention designs the contact 150 and pin 170 with a flexible contact connection, which effectively prevents poor contact between the slider 140 and pin 170 when the displacement of the slider 140 is slightly insufficient, and prevents damage to pin 170 when the displacement of the slider 140 is slightly excessive. If the contact 150 and pin 170 were rigidly connected, since the latch 110 and the latch assembly 200 are not rigidly connected, any slight movement of the passenger's body could cause relative movement between the latch 110 and the latch assembly 200. In this case, the slider 140 would also have a slight displacement, resulting in excessive contact force or poor contact between the contact 150 and pin 170.

[0069] This invention also includes a detection device for detecting whether the cable 400 is conductive to indicate whether the seat belt is fastened, a pressure sensor for sensing whether there is someone in the seat, and an alert device. The alert device includes a silent alert device for silently transmitting information about the unfastened seat belt detected by the detection device based on the pressure information detected by the pressure sensor.

[0070] Specifically, the silent reminder devices include seatback screens or reading projectors. When the LIFT cover on the latch assembly 200 is pulled, the latch 110 disengages from the latch assembly 200, the slider 140 returns to its original position under the reaction force of the elastic element, and the contact 150 disengages from the pin 170. It can be seen that during the process of fastening and unfastening the seatbelt, the contact 150 and pin 170 also come into contact and separate; this structure is defined as a "latch switch." When the pressure sensor indicates that the seat is occupied and the latch switch is in the open state, the cabin processor sends a command to the seatback screen based on this information. The seatback screen lights up, displaying a seatbelt unfastened icon to remind the passenger. For cases where there is no seatback screen in front of the first row of passengers, or for models without seatback screens, the corresponding information is sent to the reading projector above the passenger's head. The reading projector automatically lights up, emitting a light of a different color temperature than when reading, and projects a seatbelt unfastened icon downwards to remind the passenger. Because airplane cabin windows are small and the cabin is dimly lit, lighting reminders are very noticeable in this environment.

[0071] When cabin crew search for passengers who are not wearing seat belts in the cabin, in addition to checking the cabin crew terminal display, they can also quickly locate passengers who are not wearing seat belts in real time based on the content displayed on the seat back screen or the color temperature and projected content of the projector.

[0072] Current chair back screens and reading projectors lack the aforementioned functions. Implementing these functions requires further expansion and upgrades to the existing equipment. This does not require adding extra equipment or occupying significant space. Upgrading the reading lamp to a reading projector retains the original reading function while adding projection capabilities, enriching the functionality and enhancing the technological feel. The light projection reminder is not limited to seatbelt unfastened seats; like the chair back screen, it is highly expandable. If needed, the projected content can be further expanded to remind users to straighten the chair back, fold up the small table, or other customized content.

[0073] The reading projection light is structurally divided into two parts: a reading light that performs the original reading function, and a projection light that performs the aforementioned light projection function. Therefore, the reading light and the projection light each have independent light sources 510 and 520, respectively, both located on the lamp panel 530. The projection light source must also be combined with a certain number of lenses 540 to complete the projection. The quartz glass lens 550 in the center of the lens 540 provides the projected content. When the reading projection light receives data from the cabin data processor and needs to remind passengers, the PCB control board 560 controls the light source 520 of the projection light located on the lamp panel 530 to illuminate, projecting the pattern within the quartz glass lens 550.

[0074] Below, refer to Figures 1 to 17Based on the above description of the technical features, the control method of the aircraft cabin seat unfastened detection and reminder device of the present invention is described as follows:

[0075] S1. Detects whether there is someone in the seat using a pressure sensor;

[0076] S2. Identify whether the seatbelt is fastened by checking whether the contact element and the pin are in contact and disengaged (as defined above as the "latch switch");

[0077] S3. The seat information collector collects the pressure and fastening information on the seat and transmits it along with the corresponding seat number to the cabin data processor.

[0078] S4, the cabin data processor aggregates and processes the data from each seat information collector and then transmits it to the cabin crew terminal display.

[0079] S5. Flight attendants can obtain real-time information on whether passengers are wearing seat belts based on the content displayed on the flight attendant terminal, and can remind passengers to fasten their seat belts in a timely manner when necessary;

[0080] S6. Passengers should fasten their seat belts themselves according to the reminders from the reminder device or the crew.

[0081] The above description is merely a preferred embodiment of the present invention, and should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. An aircraft cabin seatbelt unfastened detection and reminder device, comprising a latch assembly that is mated and connected to a buckle assembly, characterized in that, The locking tongue assembly includes: The latch is fixed to the front end of the latch assembly housing and is used to insert into the latch assembly; The slider is slidably connected inside the housing of the latch assembly and moves between a first position, a second position and a third position. The slider is normally located in the first position. When the latch is inserted into the latch assembly, the slider moves towards the tail end under the thrust of the housings on both sides of the latch assembly so that the slider moves from the first position to the third position. Two pins are fixed to the tail end of the latch assembly housing; The contact element moves together with the slider, and when the slider reaches the second position, the contact element just makes contact with the two pins; An elastic element is disposed between the slider and the pins, used to ensure that the contact element and the two pins are in flexible contact when the slider moves from the second position to the third position, and to push the slider back from the third position to the first position when the latch disengages from the locking assembly; A cable is connected to two pins, and the cable is conductive when the contact element contacts the two pins. The testing equipment is used to detect whether the cable is conductive to indicate whether the seat belt is fastened.

2. The aircraft cabin seat belt unfastened detection and reminder device as described in claim 1, characterized in that, It also includes pressure sensors and alert devices to detect whether someone is in the seat; The reminder device includes a silent reminder device, which includes a seat back screen or a reading projection light, used to silently transmit the information that the seat belt is not fastened, based on the pressure information detected by the pressure sensor.

3. The aircraft cabin seatbelt unfastened detection and reminder device as described in claim 2, characterized in that, The elastic element includes a first elastic element for pushing the slider back from the third position to the first position, a second elastic element for making the contact element and the two pins in a flexible contact state.

4. The aircraft cabin seatbelt unfastened detection and reminder device as described in claim 3, characterized in that, The second elastic element is located between the slider and the contact element. The slider has a protruding I-shaped foot at the middle of its tail end, and the contact element is U-shaped and hangs on the I-shaped foot. During the process of the slider moving from the second position to the third position, the slider continues to retract, and the I-shaped foot at the tail end of the slider disengages from the contact member. The contact member no longer moves further and maintains flexible contact with the pin under the elastic force of the second elastic member.

5. The aircraft cabin seat belt unfastened detection and reminder device as described in claim 3, characterized in that, The second elastic element is located at the front end of the pin, making the pin a compressible structure; the contact element is square and fixed to the tail end of the slider. During the process of the slider moving from the second position to the third position, the contact member compresses the pin and maintains flexible contact with the pin.

6. The aircraft cabin seatbelt unfastened detection and reminder device as described in claim 4, characterized in that, The outer shell of the latch assembly is composed of a latch top cover and a latch bottom cover that are fastened together. The front end of the latch top cover has a large cylindrical groove in the middle and three small cylindrical grooves evenly distributed around the large cylindrical groove. The front end of the latch bottom cover has a large cylinder in the middle and three small cylinders evenly distributed around the large cylinder. The tail end of the latch is provided with a large round hole and three small round holes evenly distributed around the large round hole. The large cylinder and small cylinder of the latch bottom cover pass through the large round hole and small round hole of the latch respectively and are inserted into the large cylindrical groove and small cylindrical groove of the latch top cover.

7. The aircraft cabin seatbelt unfastened detection and reminder device as described in claim 6, characterized in that, The front ends of the upper and lower covers of the latch have forward-protruding structures on both sides to protect the slider and prevent it from being accidentally touched.

8. The aircraft cabin seatbelt unfastened detection and reminder device as described in claim 6, characterized in that, The upper and lower covers of the latch have grooves formed in the middle of their front ends for the housings on both sides of the latch assembly to extend into; when the housings on both sides of the latch assembly extend into the bottom of the grooves, the slider is pushed to the third position.

9. The aircraft cabin seatbelt unfastened detection and reminder device as described in claim 8, characterized in that, When the front end of the slider retracts to coincide with the bottom of the groove at the front end of the upper and lower covers of the latch, the I-shaped foot at the tail end of the slider has a certain gap with the bottom of the U-shaped groove of the contact member.

10. A control method for an aircraft cabin seat unfastened detection and reminder device as described in any one of claims 1-5, characterized in that, The steps are as follows: S1. Detects whether there is someone in the seat using a pressure sensor; S2. Identify whether the seatbelt is fastened by checking whether the contact element and the pin are in contact and separating. S3. The seat information collector collects the pressure and fastening information on the seat and transmits it along with the corresponding seat number to the cabin data processor. S4, the cabin data processor aggregates and processes the data from each seat information collector and then transmits it to the cabin crew terminal display. S5. Flight attendants can obtain real-time information on whether passengers are wearing seat belts based on the content displayed on the flight attendant terminal display. S6. Passengers should fasten their seat belts themselves according to the reminders from the reminder device or the crew.

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