Emergency landing device for unmanned aerial vehicle

Abstract

The utility model discloses an emergency landing device for unmanned plane belongs to unmanned plane carrying equipment technical field, and the purpose is to solve the damage caused by unmanned plane falling and the threat of personnel safety, property safety, public order and privacy and the poor commonality of existing emergency mechanism. Including: emergency box, emergency box at least includes the sliding cover of sliding open and close at the upper end of box body, adjustable mounting structure passes through adjustable mounting structure and installs emergency box on the unmanned plane body of different size, sets up the landing protection device in emergency box, and the landing protection device includes umbrella box, sets up the parachute in umbrella box, sets up the ejection mechanism and lock catch between umbrella box lower extreme and emergency box bottom, and the umbrella rope of parachute passes through the hole of umbrella box bottom and is fixed in emergency box bottom through lock catch, and umbrella box is upwardly ejected through ejection mechanism, and power mechanism, and the sliding cover of power mechanism drives emergency box upper end opens and closes simultaneously and releases umbrella box when being in the completely open and close state.

Description

Technical Field

[0001] This utility model belongs to the field of unmanned aerial vehicle (UAV) carried equipment technology, specifically relating to an emergency landing device for UAVs. Background Technology

[0002] Emergency landing technology for drones in case of emergencies stems from the numerous challenges faced by drones in their current operations. Drones are widely used in many important fields such as agriculture, logistics and transportation, emergency rescue, power facility maintenance, aerial photography and film production, and construction and engineering. However, during flight, drones are prone to crashes due to various reasons, including hardware failures, software and communication problems, and harsh operating environments.

[0003] Conventional drones lack emergency landing devices for unforeseen circumstances, making it difficult to ensure that internal problems are detected during every inspection, especially during extended missions. If a drone crashes due to an emergency, it will fall directly to the ground from a high altitude, rendering it unusable and posing threats to personnel safety, property security, public order, and privacy. While emergency response systems are available, conventional systems are specific to a single drone type, lacking versatility. Utility Model Content

[0004] The purpose of this invention is to propose an emergency landing device for unmanned aerial vehicles (UAVs) to solve the problems of damage caused by UAV crashes and threats to personnel safety, property safety, public order and privacy, as well as the poor versatility of existing emergency response agencies.

[0005] To achieve the above objectives, the emergency landing device for unmanned aerial vehicles of this utility model includes:

[0006] An emergency box, the emergency box comprising at least a box body and a sliding cover located at the upper end of the box body that slides open and closes;

[0007] An adjustable mounting structure allows the emergency box to be mounted on drone bodies of different sizes.

[0008] The landing protection device installed in the emergency box includes a parachute box, a parachute installed in the parachute box, an ejection mechanism installed between the lower end of the parachute box and the bottom of the emergency box, and a buckle. The parachute rope passes through a hole at the bottom of the parachute box and is fixed to the bottom of the emergency box by the buckle. The parachute box is ejected upward by the ejection mechanism.

[0009] And a power mechanism, which drives the sliding cover at the top of the emergency box to open and close simultaneously, releasing the umbrella box when it is fully open or closed.

[0010] The power mechanism includes:

[0011] The gear set is located at one end of the emergency box. The gear set includes at least a driving gear and two output shafts symmetrically arranged on both sides of the driving gear. Two driven gears are respectively arranged on the two output shafts. The two driven gears are axially offset. The driving gear drives the two driven gears to rotate synchronously through the gear transmission set. One end of the rotating shaft of the driving gear is driven by a motor.

[0012] The pendulum ring is installed inside the emergency box, and the pendulum ring and the rotating shaft of the drive gear of the gear set are coaxially and fixedly connected.

[0013] Two sets of parallel four-bar linkages are set on both sides of the pendulum ring. As the pendulum ring rotates, the two sets of parallel four-bar linkages drive the two oppositely arranged sliding covers to open and close.

[0014] It also features two symmetrically arranged cam devices, each fixed to a separate output shaft. When the emergency box's sliding cover is closed, the cam devices lock the ejection mechanism. When the gear set drives the sliding cover to fully open via the linkage mechanism, the cam devices completely disengage from the bottom plate of the umbrella box, and the umbrella box is fully released.

[0015] The umbrella box includes:

[0016] The base plate, the cam device and the upper surface of the base plate contact or disengage to achieve clamping or releasing of the base plate;

[0017] And an annular frame located at the center of the upper surface of the base plate, with the parachute located within the annular frame.

[0018] The emergency kit also includes:

[0019] A back support rod connects the sliding cover and the box body. Both ends of the back support rod are connected to the sliding cover and the protruding part inside the box body through a rotating joint, respectively.

[0020] And a limiting plate fixed to the inner wall of the emergency box. When the umbrella box is in the fully released state, the lowest point of the cam device is higher than the upper surface of the limiting plate; after the umbrella box is launched upward, the upper surface of the base plate and the lower surface of the limiting plate contact and limit the movement.

[0021] Each set of parallel four-bar linkages includes:

[0022] A connecting rod, one end of which is rotatably engaged with the side wall of the swing ring;

[0023] The rocker arm is bent, with one end rotatingly engaged with the other end of a connecting rod, and the other end rotatingly engaged with a protruding portion on the lower surface of the sliding cover. The bent part of the rocker arm is close to the end connected to the connecting rod, and the bent part of the rocker arm rotatingly engages with a protruding portion inside the emergency box. The rod between the end of the rocker arm that engages with the sliding cover and the bent part of the rocker arm is an arc-shaped rod. When the sliding cover is fully open, the arc-shaped rod portion avoids the body of the emergency box.

[0024] And a support rod, one end of which is rotatably engaged with a protruding part inside the emergency box, and the other end of which is rotatably engaged with a protruding part on the lower surface of the sliding cover.

[0025] The power mechanism also includes:

[0026] A first rotation limit rod is set on the emergency box body and located outside the swing ring. When the sliding cover is opened to the maximum, the first connecting ear on the side wall of the swing ring rotates and engages with the connecting rod of any set of parallel four-bar linkages, and the first connecting ear of the swing ring contacts and limits the first rotation limit rod.

[0027] And a second rotation limit rod is set on the emergency box body and located outside the swing ring. When the sliding cover is fully closed, the second connecting ear on the side wall of the swing ring rotates and engages with the connecting rod of another set of parallel four-bar linkages, and the second connecting ear of the swing ring contacts and limits the movement with the second rotation limit rod.

[0028] The adjustable mounting structure includes multiple sets of binding mechanisms arranged side by side, each set of binding mechanisms including:

[0029] An adjustable strap is fixedly connected to the emergency box in the middle, with its two ends extending out from both sides of the emergency box as free ends.

[0030] And an adjustable magnetic snap fastener, the adjustable magnetic snap fastener having an N pole and an S pole, the outer wall of one free end of the adjustable strap being provided with an N pole or an S pole, the inner wall of the other free end of the adjustable strap being provided with an S pole or an N pole, and being magnetically connected to the outer wall of one free end of the adjustable strap being provided with an N pole or an S pole.

[0031] The ejection mechanism is a spring, and the spring is in a compressed state when the umbrella box is not released.

[0032] The beneficial effects of this utility model are as follows: The emergency landing device for drones of this utility model is installed on the drone body through adjustable straps and adjustable magnetic buckles. It is versatile, not only reducing manufacturing costs but also enabling efficient mass production. It is of great significance for improving the safety of drones and surrounding personnel. The emergency box of this utility model contains a parachute box with an open top design. Inside is a small parachute, which is launched by an ejection mechanism. If the ejection mechanism malfunctions, the open top design can still create a difference in airflow velocity on both sides of the parachute, generating a pressure difference, which makes the parachute move upward and thus deploy, achieving the emergency purpose. This has practical significance for improving the stability of emergency mechanisms. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the emergency landing device for unmanned aerial vehicles (UAVs) of this utility model in the disassembled state from the UAV body.

[0034] Figure 2 This is a schematic diagram of the overall structure of the emergency landing device for unmanned aerial vehicles (UAVs) in this practical application.

[0035] Figure 3 This is a partial cross-sectional view of the emergency landing device for unmanned aerial vehicles of this utility model;

[0036] Figure 4 This is a schematic diagram of the gear set structure in the emergency landing device for unmanned aerial vehicles of this utility model;

[0037] Figure 5 This is a schematic diagram of the limiting plate structure in the emergency landing device for unmanned aerial vehicles of this utility model;

[0038] Figure 6 This is a schematic diagram of the parachute in the open state of the emergency landing device for unmanned aerial vehicles according to this utility model;

[0039] Figure 7 This is a schematic diagram of the internal structure of the emergency landing device for unmanned aerial vehicles of this utility model when it is not activated.

[0040] Figure 8 This is a schematic diagram of the internal structure of the emergency landing device for unmanned aerial vehicles (UAVs) of this utility model when it is in the activated state;

[0041] Figure 9 This is a schematic diagram of the parallel four-bar linkage mechanism of the emergency landing device for unmanned aerial vehicles of this utility model when it is not activated.

[0042] Figure 10 This is a schematic diagram of the parallel four-bar linkage when the emergency landing device for unmanned aerial vehicles of this utility model is in the activated state;

[0043] The components include: 1. UAV body; 2. Emergency box; 201. Box body; 202. Sliding cover; 203. Limiting plate; 204. Back support rod; 3. Adjustable mounting structure; 301. Adjustable strap; 302. Adjustable magnetic buckle; 4. Landing protection device; 401. Parachute box; 402. Parachute; 403. Ejection mechanism; 404. Lock; 405. Base plate; 406. Ring frame; 5. Power mechanism; 501. Gear set; 502. Drive gear; 503. Driven gear; 504. Rotating shaft; 505. Swing ring; 506. Cam device; 507. Connecting rod; 508. Rocker arm; 509. Support rod; 510. First rotation limit rod; 511. Second rotation limit rod. Detailed Implementation

[0044] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0045] See Figures 1-10 The emergency landing device for unmanned aerial vehicles of this utility model includes:

[0046] Emergency box 2, the emergency box 2 includes at least a box body 201 and a sliding cover 202 located at the upper end of the box body 201 that slides open and closes;

[0047] An adjustable mounting structure 3 is used to mount the emergency box 2 onto the drone body 1 of different sizes.

[0048] The landing protection device 4 is installed in the emergency box 2. The landing protection device 4 includes a parachute box 401, a parachute 402 installed in the parachute box 401, a parachute 402 installed between the lower end of the parachute box 401 and the bottom of the emergency box 2, and a lock 404. The parachute rope of the parachute 402 passes through the hole at the bottom of the parachute box 401 and is fixed to the bottom of the emergency box 2 by the lock 404. The parachute box 401 is ejected upward by the parachute 402.

[0049] And the power mechanism 5, which drives the sliding cover 202 at the top of the emergency box 2 to open and close, and releases the umbrella box 401 when it is fully open or closed.

[0050] The power mechanism 5 includes:

[0051] The gear set 501 is located at one end of the emergency box 2. The gear set 501 includes at least a drive gear 502 and two output shafts symmetrically arranged on both sides of the drive gear 502. Two driven gears 503 are respectively arranged on the two output shafts and are axially offset. The drive gear 502 drives the two driven gears 503 to rotate synchronously through the gear transmission set. One end of the rotating shaft 504 of the drive gear 502 is driven by a motor.

[0052] The swing ring 505 is installed inside the emergency box 2, and the swing ring 505 and the rotating shaft 504 of the drive gear 502 of the gear set 501 are coaxially and fixedly connected.

[0053] Two sets of parallel four-bar linkages are set on both sides of the pendulum ring 505. When the pendulum ring 505 rotates, the two sets of parallel four-bar linkages drive the two oppositely arranged sliding covers 202 to open and close.

[0054] And two symmetrically arranged cam devices 506, which are fixed on two output shafts respectively. When the sliding cover 202 of the emergency box 2 is closed, the cam device 506 locks the ejection mechanism 403. When the gear set 501 drives the sliding cover 202 to open completely through the connecting rod 507 mechanism, the cam device 506 completely leaves the bottom plate 405 of the umbrella box 401, and the umbrella box 401 is completely released.

[0055] The umbrella box 401 includes:

[0056] The base plate 405, the cam device 506 and the upper end surface of the base plate 405 are in contact or disengaged to achieve the clamping or releasing of the base plate 405;

[0057] And an annular frame 406 is set at the center of the upper end face of the base plate 405, and the parachute 402 is located inside the annular frame 406.

[0058] The emergency box 2 also includes:

[0059] A back support rod 204 is connected between the sliding cover 202 and the box body 201. Both ends of the back support rod 204 are connected to the inner protruding parts of the sliding cover 202 and the box body 201 respectively through a rotating joint.

[0060] And the limiting plate 203 fixed to the inner wall of the emergency box 2, when the umbrella box 401 is in the fully released state, the lowest point of the cam device 506 is higher than the upper end surface of the limiting plate 203; after the umbrella box 401 is ejected upward, the upper end surface of the base plate 405 and the lower end surface of the limiting plate 203 contact and limit the position.

[0061] Each set of parallel four-bar linkages includes:

[0062] Link 507, one end of which is rotatably engaged with the side wall of the swing ring 505;

[0063] A bent rocker arm 508 is provided, with one end of the rocker arm 508 rotatably engaged with the other end of the connecting rod 507, and the other end of the rocker arm 508 rotatably engaged with the protruding part on the lower surface of the sliding cover 202. The bent part of the rocker arm 508 is close to the end connected to the connecting rod 507, and the bent part of the rocker arm 508 rotatably engages with the protruding part on the inner side of the box body 201 of the emergency box 2. The rod between the end of the rocker arm 508 that engages with the sliding cover 202 and the bent part of the rocker arm 508 is an arc-shaped rod. When the sliding cover 202 is fully open, the arc-shaped rod avoids the box body 201 of the emergency box 2 to prevent collision with the box body 201.

[0064] And a support rod 509, one end of which is rotatably engaged with the protruding part inside the box body 201 of the emergency box 2, and the other end is rotatably engaged with the protruding part on the lower surface of the sliding cover 202.

[0065] The power mechanism 5 also includes:

[0066] A first rotation limiting rod 510 is set on the body 201 of the emergency box 2 and located outside the swing ring 505. When the sliding cover 202 is opened to the maximum, the first connecting ear on the side wall of the swing ring 505 rotates and engages with the connecting rod 507 of any set of parallel four-bar linkages, and the first connecting ear of the swing ring 505 contacts and limits the first rotation limiting rod 510.

[0067] And a second rotation limiting rod 511 is provided on the body 201 of the emergency box 2 and located outside the swing ring 505. When the sliding cover 202 is fully closed, the second connecting ear on the side wall of the swing ring 505 rotates and engages with the connecting rod 507 of another set of parallel four-bar linkages, and the second connecting ear of the swing ring 505 contacts and limits the second rotation limiting rod 511.

[0068] The emergency box 2 is fixed to the drone body 1 via an adjustable mounting structure 3. The cam device 506 is installed on the inner side of the emergency box 2, the ejection mechanism 403 is installed at the bottom of the emergency box 2, and the parachute box 401 is installed above the ejection mechanism 403. The parachute 402 is placed inside the parachute box 401 to ensure that it does not interfere with the operation of other components. The parachute 402 passes through a small hole at the bottom of the parachute box 401 and is connected and fixed to the bottom of the emergency box 2 via a latch 404, ensuring that it can support the weight of the drone without breaking.

[0069] The cam device 506 is keyed to the output shaft, the pendulum ring 505 is keyed to the rotating shaft 504, and the output shaft and rotating shaft 504 are also keyed to the gear set 501. While the motor drives the rotating shaft 504, it also drives the gear set 501 connected to the pendulum ring 505 and the cam device 506, thus ensuring that the timing control of opening the sliding cover 202 first and then opening the parachute 402 can be performed.

[0070] The ejection mechanism 403 is located at the bottom of the emergency box 2, and the umbrella box 401 is located above it. The umbrella box 401 is limited by the limiting plate 203 to ensure that the umbrella box 401 will not be ejected during the ejection process, causing accidental injury or damage to the cam device 506.

[0071] The surface of the cam device 506 is all rounded and smooth to ensure that no excessive impact load is generated when compressing the ejection mechanism 403, thus ensuring its service life and effectiveness.

[0072] The adjustable mounting structure 3 includes multiple sets of binding mechanisms arranged side by side, each set of binding mechanisms including:

[0073] The adjustable strap 301 is fixedly connected to the emergency box 2 in the middle, and its two ends extend from both sides of the emergency box 2 as free ends. The adjustable strap 301 can be adjusted in size according to the different sizes of the drone body 1, and then installed on the drone by the adjustable magnetic buckle 302.

[0074] And an adjustable magnetic snap fastener 302, which includes an N pole and an S pole. One free end of the adjustable strap 301 has an N pole or an S pole on its outer wall, and the other free end of the adjustable strap 301 has an S pole or an N pole on its inner wall, thus engaging with the N pole or S pole on the outer wall of the free end of the adjustable strap 301. The adjustable magnetic snap fastener 302 is elongated to facilitate size adjustment.

[0075] The parachute 402 is a spring, and the spring is in a compressed state when the parachute box 401 is not released.

[0076] The working process of this utility model is as follows: the motor rotates, driving the rotating shaft 504 to rotate. The rotating shaft 504 rotates, driving the connected swing ring 505 to rotate. The rotation of the swing ring 505 drives the parallel four-bar linkage mechanism to move. The rotation of the rotating shaft 504 simultaneously drives the driven gear 503 meshing with the driving gear 502 to rotate, causing the two output shafts to rotate, which in turn drives the cam device 506 to rotate. When the motor drives, the swing ring 505 and the two sets of parallel four-bar linkage mechanisms drive the two sliding covers 202 to open. At the same time, the cam devices 506 on both sides will rotate inward under the control of the gear set 501, achieving the effect of opposite rotation to avoid interference with the other components of the emergency box 2. The cam devices 506 are located inside the emergency box 2. The parachute 402 is installed on both sides to ensure sufficient compression and uniform force on the parachute box 401 and the parachute 402, allowing the parachute 402 to eject vertically. As the sliding cover 202 opens, the cam device 506 rotates rapidly upward. When the sliding cover 202 is fully open, the cam device 506 completely releases the parachute box 401. Under the action of the ejection mechanism 403, the parachute box 401 ejects rapidly upward. The limiting plate 203 in the emergency box 2 controls the bottom plate 405 below the parachute box 401 below the cam device 506, preventing the parachute 402 from moving upward and hitting the cam device 506. At this time, due to the upward impact force, the parachute 402 detaches from the parachute box 401 and opens.

[0077] One free end of the adjustable strap 301 is provided with a through hole, and the other free end of the adjustable strap 301 passes through the through hole and engages with the corresponding position of the side wall to complete the fixation of the emergency box 2 on the drone body 1. Due to its adjustability, it can adapt to drones of different sizes and be securely installed, avoiding the displacement of the emergency box 2 and other mechanisms on the drone body 1 during landing.

Claims

1. An emergency landing device for unmanned aerial vehicles, characterized in that, include: Emergency box (2), the emergency box (2) includes at least a box body (201) and a sliding cover (202) located at the upper end of the box body (201) that can be slidably opened and closed. An adjustable mounting structure (3) is used to mount the emergency box (2) on the drone body (1) of different sizes. The landing protection device (4) installed in the emergency box (2) includes a parachute box (401), a parachute (402) installed in the parachute box (401), an ejection mechanism (403) installed between the lower end of the parachute box (401) and the bottom of the emergency box (2), and a buckle (404). The parachute rope of the parachute (402) passes through the hole at the bottom of the parachute box (401) and is fixed to the bottom of the emergency box (2) by the buckle (404). The parachute box (401) is ejected upward by the ejection mechanism (403). And a power mechanism (5), through which the sliding cover (202) at the top of the emergency box (2) is opened and closed, and the umbrella box (401) is released when it is fully open and closed.

2. The emergency landing device for unmanned aerial vehicles according to claim 1, characterized in that, The power mechanism (5) includes: The gear set (501) is located at one end of the emergency box (2). The gear set (501) includes at least a drive gear (502) and two output shafts symmetrically arranged on both sides of the drive gear (502). Two driven gears (503) are respectively arranged on the two output shafts. The two driven gears (503) are offset in the axial direction. The drive gear (502) drives the two driven gears (503) to rotate synchronously through the gear transmission set. One end of the rotating shaft (504) of the drive gear (502) is driven by a motor. The swing ring (505) is installed inside the emergency box (2), and the swing ring (505) and the rotating shaft (504) of the drive gear (502) of the gear set (501) are coaxially and fixedly connected. Two sets of parallel four-bar linkages are set on both sides of the pendulum ring (505). When the pendulum ring (505) rotates, the two sets of parallel four-bar linkages drive the two oppositely arranged sliding covers (202) to open and close. And two symmetrically arranged cam devices (506), the two cam devices (506) are fixed on two output shafts respectively. When the sliding cover (202) of the emergency box (2) is closed, the cam device (506) locks the ejection mechanism (403). When the gear set (501) drives the sliding cover (202) to open completely through the linkage (507) mechanism, the cam device (506) completely leaves the bottom plate (405) of the umbrella box (401) and the umbrella box (401) is completely released.

3. The emergency landing device for unmanned aerial vehicles according to claim 2, characterized in that, The umbrella case (401) includes: The base plate (405) is connected to or separated from the upper surface of the cam device (506) to achieve the clamping or releasing of the base plate (405); And an annular frame (406) is set at the center of the upper end face of the base plate (405), and the parachute (402) is located inside the annular frame (406).

4. The emergency landing device for unmanned aerial vehicles according to claim 3, characterized in that, The emergency box (2) also includes: A back support rod (204) is connected between the sliding cover (202) and the box body (201). The two ends of the back support rod (204) are connected to the inner protruding parts of the sliding cover (202) and the box body (201) respectively through a rotating joint. And the limiting plate (203) fixed to the inner wall of the emergency box (2), when the umbrella box (401) is in the fully released state, the lowest point of the cam device (506) is higher than the upper end surface of the limiting plate (203); after the umbrella box (401) is ejected upward, the upper end surface of the bottom plate (405) and the lower end surface of the limiting plate (203) are in contact and limited.

5. The emergency landing device for unmanned aerial vehicles according to claim 2, characterized in that, Each set of parallel four-bar linkages includes: Connecting rod (507), one end of which is rotatably engaged with the side wall of the swing ring (505); A bent rocker arm (508) is provided, with one end of the rocker arm (508) rotatingly engaged with the other end of the connecting rod (507), and the other end of the rocker arm (508) rotatingly engaged with the protruding part of the lower surface of the sliding cover (202). The bent part of the rocker arm (508) is close to the end connected to the connecting rod (507), and the bent part of the rocker arm (508) rotatingly engaged with the protruding part inside the box body (201) of the emergency box (2). The rod between the end of the rocker arm (508) engaged with the sliding cover (202) and the bent part of the rocker arm (508) is an arc-shaped rod. When the sliding cover (202) is fully open, the arc-shaped rod part avoids the box body (201) of the emergency box (2). And a support rod (509), one end of which is rotatably engaged with the protruding part inside the box body (201) of the emergency box (2), and the other end is rotatably engaged with the protruding part on the lower surface of the sliding cover (202).

6. The emergency landing device for unmanned aerial vehicles according to claim 5, characterized in that, The power mechanism (5) also includes: A first rotation limiting rod (510) is set on the box body (201) of the emergency box (2) and located outside the swing ring (505). When the sliding cover (202) is opened to the maximum, the first connecting ear on the side wall of the swing ring (505) rotates and engages with the connecting rod (507) of any set of parallel four-bar linkages. The first connecting ear of the swing ring (505) contacts and limits the first rotation limiting rod (510). And a second rotation limiting rod (511) is set on the box body (201) of the emergency box (2) and located outside the swing ring (505). When the sliding cover (202) is completely closed, the second connecting ear on the side wall of the swing ring (505) rotates and engages with the connecting rod (507) of another set of parallel four-bar linkages, and the second connecting ear of the swing ring (505) contacts and limits the second rotation limiting rod (511).

7. The emergency landing device for unmanned aerial vehicles according to claim 1, characterized in that, The adjustable mounting structure (3) includes multiple sets of binding mechanisms arranged side by side, each set of binding mechanisms including: An adjustable strap (301) is fixedly connected to the emergency box (2) in the middle, and its two ends extend from both sides of the emergency box (2) as free ends. And an adjustable magnetic snap fastener (302), the adjustable magnetic snap fastener (302) includes an N pole and an S pole, the outer wall of one free end of the adjustable strap (301) is provided with an N pole or an S pole, the inner wall of the other free end of the adjustable strap (301) is provided with an S pole or an N pole, and is attracted and connected to the outer wall of one free end of the adjustable strap (301) provided with an N pole or an S pole.

8. The emergency landing device for unmanned aerial vehicles according to claim 1, characterized in that, The ejection mechanism (403) is a spring, and the spring is in a compressed state when the umbrella box (401) is not released.

Images