Parachute diving folding fin mechanism

Abstract

This invention discloses a paragliding diving folding fin mechanism, comprising an adjustment strap 1, a quick-release buckle 2, a shoe cover 3, a torsion spring 4, an elastic fixing strap 5, and fin surfaces 6. The folding fins have three states: deployed for diving, semi-folded for walking, and transport folded. The shoe cover 3 and fin surfaces 6 are made of plastic. The elastic fixing strap 5 is made of rubber and consists of a large elastic fixing strap 5-1 and a small elastic fixing strap 5-2, integrally molded. The small elastic fixing strap 5-2 passes through holes 11 on both sides of the fin surface 6, positioning itself at the bottom of the fin surface 6 and shoe cover 3. One end of the torsion spring 4 connects to the shoe cover 3, and the other end connects to the fin surface 6, providing power for the folding and unfolding of the fins. This invention, through its fin structure design, increases the ability to walk freely while wearing the fins, and allows the folding fins to be unfolded and maintained in the deployed diving state after entering the water.

Description

Technical Field

[0001] This invention belongs to the fields of parachute maritime rescue and civilian diving, specifically, it is a parachute diving folding fin mechanism. Background Technology

[0002] Folding fins are used in parachute rescue missions in my country. To ensure that parachute rescuers can quickly enter the water for rescue operations, they must wear folding fins on the transport aircraft. At this time, the fins are in a semi-folded walking state, which does not affect the normal movement of the parachute rescuers. After the rescuers parachute into the water, they can manually unfold the fins to enter the underwater deployment state. This provides the rescuers with forward propulsion and facilitates their movement in the water.

[0003] Currently, folding swimming fins in my country only have two modes: folded and unfolded. This cannot meet the needs of people who want to walk while wearing fins. Summary of the Invention

[0004] The purpose of this invention is to provide a folding fin mechanism for parachute diving.

[0005] The technical solution to achieve the purpose of this invention is as follows: a parachute diving folding fin mechanism, including a shoe cover, a torsion spring, an elastic fixing strap, and a fin surface; the folding fin has three states, namely, the diving unfolded state, the semi-folded walking state, and the fully folded state; the elastic fixing strap is composed of a large elastic fixing strap and a small elastic fixing strap, which are integrally formed; the small elastic fixing strap can pass through holes on both sides of the fin surface, so that the small elastic fixing strap is located at the bottom of the fin surface and the shoe cover; one end of the torsion spring is connected to the shoe cover, and the other end is connected to the fin surface.

[0006] The webbed surface is made of plastic and consists of a webbed panel and two side ribs. The trunnion holes at the bottom of the ribs mate with the trunnions on both sides of the shoe cover and are fixed with bolts. The webbed panel has two symmetrical fixing holes in the middle, and two side holes below the fixing holes. A webbed tongue is placed between the side holes, and a buckle hole is located in the middle of the side holes. The two ball heads at the lower end of the large elastic fixing strap mate with the fixing holes of the webbed surface, allowing the elastic fixing strap to be connected, fixed, and rotated to the webbed surface. The small elastic fixing strap can pass through the side holes on both sides, so that the small elastic fixing strap is located at the bottom of the webbed surface and the shoe cover. The webbed surface torsion spring grooves on both sides mate with the torsion spring, limiting the spatial position of one side of the torsion spring in the webbed surface. One end of the small shaft on the webbed surface hooks one end of the torsion spring, and the other end of the small shaft on the webbed surface is fixedly connected to the webbed surface torsion spring groove.

[0007] The shoe cover is made of plastic and has a C-shaped buckle at the front end, which can be inserted into the corresponding buckle hole on the fin surface. The C-shaped buckle can be locked or pulled out using an elastic strap to maintain the diving unfolded state or the semi-folded walking state. The width L1 of the C-shaped buckle is the same as the width L2 of the fin tongue in the middle of the fin surface. The shoe cover has side plates on both sides, and the gap between the side plates and the shoe cover is the shoe cover torsion spring groove. The shoe cover has trunnions and quick-release buckles on both sides. The shoe cover side plates are equipped with shoe cover side axles. One end of the shoe cover side axle is connected to the shoe cover side plate, and the other end is hooked to the torsion spring. The shoe cover torsion spring groove cooperates with the torsion spring to limit the spatial position of the other side of the torsion spring in the shoe cover. The shoe cover side axle hooks the other end of the torsion spring. The trunnion is fitted with the central axis of the torsion spring and connected to the fin surface by screws. The quick-release buckle is connected to the quick-release buckle.

[0008] It also includes an adjustment strap and a quick-release buckle; the quick-release buckle is integrally molded from plastic material, and its central hole can be quickly connected to the quick-release buckle of the shoe cover; the adjustment strap is made of rubber material, and the quick-release buckle is connected to the adjustment strap to adjust the length of the adjustment strap; the adjustment strap has a pattern.

[0009] The elastic fixing straps are made of rubber. The large and small elastic fixing straps can be stretched and hooked onto the C-shaped tongue buckle of the shoe cover to complete the underwater unfolded state and the walking semi-folded state.

[0010] When the fins are in the deployed state, the fin tongue in the middle of the fins rests in the groove in front of the C-shaped buckle, thus deploying the fins. The large elastic retaining strap is secured in the groove on the upper part of the C-shaped buckle of the shoe cover, and the small elastic retaining strap passes through the holes on both sides of the fins and fits into the groove on the lower part of the C-shaped buckle. This gives the small elastic retaining strap elasticity to the C-shaped buckle, preventing it from moving downwards. The large elastic retaining strap is secured in the groove on the upper part of the C-shaped buckle, preventing it from moving upwards. At this time, the shoe cover and the fins remain in the deployed state.

[0011] When it is necessary to deactivate the diving deployment, remove the large elastic securing strap from the groove on the C-type tongue buckle and the small elastic securing strap from the groove on the lower C-type tongue buckle. Apply force to the C-type tongue buckle to separate the front groove of the C-type tongue buckle from the fin tongue in the middle of the fin surface.

[0012] When in a semi-folded walking position, the small elastic fixing strap is locked in the groove under the C-shaped tongue buckle, the web surface forms a fixed angle with the shoe cover, separates from the ground, and the web surface points in the same direction as the user's forward movement;

[0013] When it is necessary to release the semi-folded walking position, apply a force to the C-type tongue buckle to pull the elastic fixing strap out of the groove under the C-type tongue buckle, and fold the fins into the transport folded position.

[0014] When fully folded, the elastic retaining strap is not in contact with the shoe cover and is not under stress; the central axis of the torsion spring is aligned with the pivot of the shoe cover and the web; one end of the torsion spring is connected to the small axis on the web side of the web, and the other end is connected to the small axis on the shoe cover side of the shoe cover; at this time, the torsion spring is in a spring-up state, causing the web and the shoe cover to fold and maintain a fixed angle.

[0015] Compared with the prior art, the present invention has the following significant advantages: (1) The present invention increases the ability to walk freely while wearing fins through the design of the fin structure, and can open and fold the fins after entering the water to maintain the diving unfolded state. (2) The structure of the fin surface, the design of the fin tongue and the design of the side holes can cooperate with the shoe cover. (3) The structure of the elastic fixing strap, with its own elasticity, cooperates with the shoe cover and the fin surface to keep the folded fins in the diving unfolded state and the semi-folded walking state. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the folding flipper structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the underwater deployment state of the present invention.

[0018] Figure 3 This is a schematic diagram of the disengaged and deployed state of the present invention.

[0019] Figure 4 This is a schematic diagram of the semi-folded walking state of the present invention.

[0020] Figure 5 This is a schematic diagram of the fully folded state of the present invention.

[0021] Figure 6 This is a schematic diagram of the shoe cover structure of the present invention.

[0022] Figure 7 This is a schematic diagram of the quick-release buckle structure of the present invention.

[0023] Figure 8 This is a schematic diagram of the adjustment belt structure of the present invention.

[0024] Figure 9 This is a schematic diagram of the webbed surface structure of the present invention.

[0025] Figure 10 This is a schematic diagram of the torsion spring structure of the present invention.

[0026] Figure 11 This is a schematic diagram of the elastic fixing belt structure of the present invention. Detailed Implementation

[0027] This invention is primarily used in parachute diving rescue missions in my country, enabling parachute rescuers to walk normally inside the transport aircraft while wearing fins, and to quickly deploy their fins for diving rescue after entering the water, reducing rescue preparation time. This invention can also be used for civilian diving, allowing users to wear fins and walk on land without having to hold them with their hands, freeing up their hands.

[0028] This invention primarily maintains the diving deployment and walking states through the shape of the webbed surface and shoe cover, as well as the elastic fixing straps.

[0029] The present invention will now be further described with reference to the accompanying drawings.

[0030] This invention has three working states. First, a fully folded state, where the webs and shoe covers are completely folded for easy carrying and transportation. Second, a semi-folded walking state, where the webs remain at a fixed angle after folding, providing convenient and comfortable walking on roads or airborne platforms. Third, a diving deployment state, where paratroopers manually deploy the webs after entering the water for normal diving activities.

[0031] The folding and unfolding flipper mechanism mainly achieves the following functions:

[0032] 1) When the folding flippers are in a semi-folded walking position, they do not affect the wearer's normal walking and maintain a certain level of comfort.

[0033] 2) Once the fins are deployed, they remain fixed, allowing for normal diving activities without rebounding.

[0034] 1) Fold the flippers as follows Figure 1 As shown, it includes components such as an adjustment strap 1, a quick-release buckle 2, a shoe cover 3, a torsion spring 4, an elastic fixing strap 5, and fins 6. The folding fins have three states: unfolded for diving, semi-folded for walking, and folded for transport.

[0035] The shoe cover 3 and the web surface 6 are made of plastic. The elastic fixing strap 5 is made of rubber and consists of a large elastic fixing strap 5-1 and a small elastic fixing strap 5-2, which are molded as a single piece. The small elastic fixing strap 5-2 can pass through the holes 11 on both sides of the web surface 6, so that the small elastic fixing strap 5-2 is located at the bottom of the web surface 6 and the shoe cover 3. One end of the torsion spring 4 is connected to the shoe cover 3, and the other end is connected to the web surface 6, providing power for the folding and unfolding of the fins.

[0036] Submersible deployment state, such as Figure 2 As shown. To clarify, a section along the AA direction is drawn at position I in the unfolded top view, and... Figure 2 The enlarged view above shows the shoe cover 3 with a C-shaped tongue buckle at the front. Figure 2 It is displayed on the upper right.

[0037] The webbed tongue 16 in the middle of the webbed surface 6 rests against the groove 22 in front of the C-shaped buckle at the front of the shoe cover 3, thus unfolding the webbed surface 6. The large elastic fixing strap 5-1 is secured in the groove 23 on the C-shaped buckle of the shoe cover, and the small elastic fixing strap 5-2 passes through the holes 11 on both sides of the webbed surface, as shown. Figure 1 As shown, the elastic retaining strap 5-2 fits into the groove 24 under the C-shaped tongue buckle, providing elastic force to the C-shaped tongue buckle 15 in the B direction, preventing the C-shaped tongue buckle 15 from moving downwards. The elastic retaining strap 5-1 secures the upper groove 23 of the C-shaped tongue buckle, preventing the C-shaped tongue buckle 15 from moving upwards. Therefore, the shoe cover 3 and the webbed surface 6 can remain in an unfolded state and cannot fold down on their own.

[0038] When it is necessary to deactivate the diving deployment state, such as Figure 3 As shown. The large elastic retaining strap 5-1 needs to be manually removed from the groove 23 on the C-shaped tongue buckle, and the small elastic retaining strap 5-2 needs to be removed from the groove 24 on the lower C-shaped tongue buckle. Furthermore, a force needs to be manually applied to the tongue buckle along the C-direction to utilize the elastic deformation of the C-shaped tongue buckle plastic, causing the front groove 22 of the C-shaped tongue buckle to separate from the web tongue 15 in the middle of the web surface 6.

[0039] In a semi-folded walking state, such as Figure 4 As shown. The webbed surface 6 forms a fixed angle with the shoe cover 3, separating it from the ground, allowing paratroopers to walk normally on the ground and on the transport aircraft. The webbed surface 6 points in the same direction as the person's movement, preventing it from hitting the rescuer's calves and affecting walking. The elastic fixing strap 5-2 is secured in the groove 24 under the C-shaped buckle of the shoe cover, applying elasticity to the C-shaped buckle 15 in the D direction. Due to the limitation of its own length when the elastic fixing strap 5 is stretched, the webbed surface 6 forms a fixed angle with the shoe cover 3.

[0040] When it is necessary to release the semi-folded walking state, a force must be manually applied to the tongue buckle in the E direction, and the elastic fixing strap 5-2 must be pulled out of the groove 24 under the C-shaped tongue buckle to fold the fins into the transport folded state.

[0041] Fully folded state, such as Figure 5 As shown. The elastic retaining strap 5 is not in contact with the shoe cover 3 and is in a stress-free state. The central axis of the torsion spring 4 is aligned with the rotation axis of the shoe cover 3 and the webbed surface 6. One end of the torsion spring is connected to the webbed surface side axle 14 of the webbed surface 6, and the other end is connected to the shoe cover side axle 18 of the shoe cover 3. At this time, due to the lack of elasticity from the elastic retaining strap 5, the torsion spring 4 is in a spring-loaded state, causing the webbed surface 6 and the shoe cover 3 to fold and maintain a fixed angle.

[0042] 2) Shoe covers 3 Figure 6 As shown, shoes can be directly put on and placed inside the shoe cover 3, which is made of one-piece molded plastic. The shoe cover 3 has a C-shaped tongue buckle 15 at the front, and side panels 17, side axles 18, torsion spring grooves 19, lugs 20, and quick-release buckles 21 on both sides. Figure 2 , Figure 4As shown, the C-type tongue buckle 15 can be used with the fin surface 6 and the elastic fixing strap 5 to maintain the diving unfolded state and the semi-folded walking state. The width L1 of the C-type tongue buckle 15 is the same as the width L2 of the fin tongue 16, as shown. Figure 2 , Figure 9 As shown. The shoe cover side plate 17 is fitted with a shoe cover side axle 18, leaving a shoe cover torsion spring groove 19. In the diving deployment state, the upper surface of the shoe cover side plate 17 contacts the lower surface of the web surface 6, increasing the contact area and enhancing the rigidity in the diving deployment state. The shoe cover torsion spring groove 19 cooperates with the torsion spring 4, limiting the spatial position of one side of the torsion spring 4 in the shoe cover 3, and the shoe cover side axle 18 hooks one end of the torsion spring 4. The trunnion 20 needs to be fitted with the torsion spring 4 and connected to the web surface 6 by screws. The quick-release buckle 21 is connected to the quick-release buckle 2. The sole has a pattern to increase friction.

[0043] 3) Quick-release buckle 2 Figure 7 As shown, it is integrally molded from plastic material. The center hole of the quick-release buckle 2 can be quickly connected to the quick-release buckle 21 of the shoe cover. The quick-release buckle 2 can be connected to the adjustment strap 1 to adjust the length of the adjustment strap 1 to accommodate the shoe size of different parachute rescue personnel.

[0044] 4) Adjusting belt 1 Figure 8 As shown, it is made of rubber and, together with the quick-release buckle 2, allows for adjustment of the length of the adjusting strap 1. The adjusting strap 1 has a textured surface to increase friction.

[0045] 5) Webbed surface Figure 9 As shown, its structure consists of a keel 7 and a webbed surface 8. It includes a fixing hole 10, two side holes 11, a buckle hole 12, a trunnion hole 9, a webbed surface torsion spring groove 13, and a webbed surface side axle 14. The keel 7 increases the rigidity of the webbed surface. The fixing hole 10 engages with the elastic fixing strap 5, allowing the elastic fixing strap 5 to be connected, fixed, and rotated to the webbed surface 6. The two side holes 11 allow the elastic adjustment strap 5-2 to pass through. The trunnion hole 9 engages with the shoe cover trunnion 15 and is fixed with bolts. The webbed surface torsion spring groove 13 engages with the torsion spring 4, defining the spatial position of one side of the torsion spring 4 within the webbed surface 6. The webbed surface side axle 14 hooks one end of the torsion spring 4.

[0046] 6) Torsion spring 4 Figure 10 As shown, one end is hung on the small shaft 18 on the side of the shoe cover, and the other end is hung on the small shaft 14 on the side of the web. The torsion spring 4 is fitted on the trunnion 15 to provide the elasticity required for folding.

[0047] 7) Elastic fixing strap 5 such as Figure 11 As shown, it is made of rubber. The two ball heads 25 at the lower end engage with the fixing holes 10 on the web surface, allowing the elastic fixing strap 5 to rotate. The large elastic fixing strap 5-1 and the small elastic fixing strap 5-2 can be extended and hooked onto the C-shaped buckle 15 of the shoe cover, completing the diving unfolded state and the walking semi-folded state.

[0048] The folding and unfolding process of the flippers is as follows:

[0049] 1) During transportation, the folding flippers are in a fully folded state and the elastic fixing strap 5 is completely loose.

[0050] 2) Before parachuting, attach the small hook of the elastic fixing strap 5 to the 3C type tongue buckle of the shoe cover, so that the fins are off the ground and extended forward at an angle, so that the folded fins are in a semi-folded walking state.

[0051] 3) After diving, the parachute rescue personnel manually open the fins and place the fin tongue against the groove in front of the C-shaped buckle of the shoe cover. The small hook of the elastic fixing strap 5 is hooked into the groove below the C-shaped buckle at the front of the shoe cover 3, and the large elastic fixing strap is inserted into the groove above the C-shaped buckle to fix the position of the fins and make the folded fins in the diving unfolded state.

[0052] 4) When exiting the diving deployment state, pull the elastic retaining strap out of the corresponding groove of the C-shaped tongue buckle, and then manually adjust the C-shaped tongue buckle.

[0053] Apply force to the C-shaped tongue buckle to disengage it from the corresponding buckle hole on the web surface, thus exiting the unfolded state.

[0054] 5) To exit the semi-folded walking position, simply pull out the C-shaped buckle of the elastic strap.

[0055] 6) This invention has undergone fitting tests and actual use tests. Test personnel wore it while in water and found that it did not fold off the ground or affect walking. Upon entry into the water, it unfolds quickly without rebounding, providing thrust like ordinary diving fins, thus verifying the feasibility of this invention. This invention has also undergone environmental tests such as salt spray tests and high and low temperature tests, verifying its environmental adaptability.

Claims

1. A parachute diving folding fin mechanism, characterized in that: Includes shoe cover (3), torsion spring (4), elastic fixing strap (5), and fin surface (6); the folding fins have three states: diving unfolded state, half-folded walking state, and fully folded state; the elastic fixing strap (5) consists of a large elastic fixing strap (5-1) and a small elastic fixing strap (5-2), which are integrally formed; the small elastic fixing strap (5-2) can pass through the holes (11) on both sides of the fin surface (6), so that the small elastic fixing strap (5-2) is located at the bottom of the fin surface (6) and shoe cover (3); one end of the torsion spring (4) is connected to the shoe cover (3), and the other end is connected to the fin surface (6); The shoe cover (3) is made of plastic and has a C-shaped buckle (15) at the front end, which can be inserted into the buckle hole (12) provided on the web surface (6). The C-shaped buckle (15) can be locked or pulled out by the elastic fixing strap (5) to maintain the diving unfolded state or the semi-folded walking state. The width L1 of the C-shaped buckle (15) is the same as the width L2 of the web tongue (16) in the middle of the web surface (6). The large elastic fixing strap (5-1) and the small elastic fixing strap (5-2) of the elastic fixing strap (5) can be stretched and hooked on the C-shaped buckle (15) of the shoe cover (3) to complete the diving unfolded state and the walking semi-folded state. When in the diving unfolded state, the fin tongue (16) in the middle of the fin surface (6) is pressed against the groove (22) in front of the C-type tongue buckle, so that the fin surface is unfolded; the large elastic fixing strap (5-1) is stuck in the groove (23) on the upper part of the C-type tongue buckle of the shoe cover, and the small elastic fixing strap (5-2) passes through the holes (11) on both sides of the fin surface (6) and is put into the groove (24) on the lower part of the C-type tongue buckle, so that the small elastic fixing strap (5-2) gives elastic force to the C-type tongue buckle (15), so that the C-type tongue buckle (15) cannot move downward, and the large elastic fixing strap (5-1) is stuck in the groove (23) on the upper part of the C-type tongue buckle, so that the C-type tongue buckle (15) cannot move upward. At this time, the shoe cover (3) and the fin surface (6) remain unfolded. When it is necessary to deactivate the diving deployment state, remove the large elastic fixing strap (5-1) from the upper groove (23) of the C-type tongue buckle, remove the small elastic fixing strap (5-2) from the lower groove (24) of the C-type tongue buckle, apply force to the C-type tongue buckle (15) to separate the front groove (22) of the C-type tongue buckle from the web tongue (16) in the middle of the web surface (6); When in a semi-folded walking state, the elastic fixing strap (5-2) is locked in the groove (24) under the C-shaped tongue buckle, the web surface (6) forms a fixed angle with the shoe cover (3), and is separated from the ground. The web surface (6) points in the same direction as the user's forward movement. When it is necessary to release the semi-folded walking state, apply a force to the C-type tongue buckle (15) to pull the elastic fixing strap (5-2) out of the groove (24) under the C-type tongue buckle, and the folded fins enter the transport folded state.

2. The parachute diving folding fin mechanism according to claim 1, characterized in that: The webbed surface (6) is made of plastic and consists of a webbed panel (8) and two keels (7) on its sides. The trunnion hole (9) at the bottom of the keel (7) is matched with the trunnion (20) on both sides of the shoe cover (3) and fixed with bolts. The webbed panel (8) has two fixing holes (10) symmetrically arranged in the middle. There are two side holes (11) below the fixing holes (10). The webbed tongue (16) is arranged between the side holes (11). The buckle hole (12) is located in the middle of the side holes (11). The two ball heads (25) at the lower end of the elastic fixing strap (5-1) are fixed with the webbed surface (6). The fixed hole (10) fits, so that the elastic fixing strap (5) can be connected and fixed to the web surface (6) and rotate. The elastic fixing strap (5-2) can pass through the side holes (11) on both sides, so that the elastic fixing strap is at the bottom of the web surface (6) and the shoe cover (3). The web surface torsion spring groove (13) provided on both sides of the web surface (6) fits with the torsion spring (4) to limit the spatial position of one side of the torsion spring (4) in the web surface (6). One end of the web surface side small shaft (14) hooks one end of the torsion spring (4), and the other end of the web surface side small shaft (14) is fixedly connected to the web surface torsion spring groove (13).

3. The parachute diving folding fin mechanism according to claim 1, characterized in that: The shoe cover (3) is made of plastic. The shoe cover (3) has shoe cover side plates (17) on both sides. The gap between the shoe cover side plates (17) and the shoe cover (3) is the shoe cover torsion spring groove (19). The shoe cover (3) has trunnions (20) and quick-release buckles (21) on both sides. The shoe cover side plates (17) are equipped with shoe cover side small shafts (18). One end of the shoe cover side small shaft (18) is connected to the shoe cover side plates (17), and the other end is hooked to the torsion spring (4). The shoe cover torsion spring groove (19) cooperates with the torsion spring (4) to limit the spatial position of the other side of the torsion spring (4) in the shoe cover (3). The shoe cover side small shaft (18) hooks the other end of the torsion spring (4). The trunnion (20) is fitted onto the central shaft of the torsion spring (4) and connected to the web surface (6) by screws. The quick-release buckle (21) is connected to the quick buckle (2).

4. The parachute diving folding fin mechanism according to claim 1, characterized in that: It also includes an adjustment strap (1) and a quick buckle (2); the quick buckle (2) is integrally molded from plastic material, and its central hole can be quickly connected to the quick-release buckle (21) of the shoe cover (3). The adjustment strap (1) is made of rubber material, and the quick buckle (2) is connected to the adjustment strap (1) to adjust the length of the adjustment strap (1). The adjustment strap (1) has patterns.

5. The parachute diving folding fin mechanism according to claim 1, characterized in that: The elastic fixing band (5) is made of rubber.

6. The parachute diving folding fin mechanism according to any one of claims 1-5, characterized in that: When fully folded, the elastic fixing strap (5) is not in contact with the shoe cover (3) and is in a stress-free state; the central axis of the torsion spring (4) is aligned with the rotation axis of the shoe cover (3) and the web (6); one end of the torsion spring (4) is connected to the web side small shaft (14) of the web (6) and the other end is connected to the shoe cover side small shaft (18) of the shoe cover (3); at this time, the torsion spring (4) is in a spring-up state, causing the web (6) and the shoe cover (3) to fold and maintain a fixed angle.

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