Fire-fighting close-fitting life jacket and wearing and using method thereof

Abstract

The invention discloses a fire-fighting close-fitting life jacket and relates to the field of life jackets, the fire-fighting close-fitting life jacket comprises a first floating part and a second floating part, the second floating part is arranged on the left side of the first floating part and provides floating force for a user, a connecting belt is arranged on the outer side of the first floating part, and a mounting seat is arranged on the front side of the connecting belt; a tightening control mechanism is arranged in the mounting seat and used for tightening control of the connecting belt, a positioning sleeve is fixed to the outer side of the first floating part, the connecting belt penetrates through the positioning sleeve and is in sliding connection with the positioning sleeve, a through opening is formed in the rear end of the connecting belt in a winding mode, and a connecting mechanism is arranged on the outer side of the through opening. According to the fire-fighting close-fitting life jacket, the first floating part and the second floating part form an enclosed wearing mode, the fire-fighting close-fitting life jacket is directly wound and is more convenient to wear, and after the first floating part and the second floating part are wound, the fire-fighting close-fitting life jacket can be tightly attached to a user through tightening of the connecting belt, so that the wearing stability of the fire-fighting close-fitting life jacket is kept.

Description

Technical Field

[0001] The invention relates to the technical field of life jackets, in particular to a fire-fighting tight life jacket and a wearing and using method thereof. Background Art

[0002] Life jackets are a common type of rescue clothing. The floating characteristics of life jackets can be used for flood rescue. Life jackets are generally vest-type structures. After entering the water, the buoyancy of the material holds the person up. However, current life jackets are vest-type, which is inconvenient to wear, and they need to be tied after wearing. After wearing, the life jacket is too loose and there will be a shaking and unstable phenomenon. Prior art 1 (publication number CN106275318A, Chinese patent published on January 4, 2017) is a life jacket, which includes: a life jacket body; a positioning module arranged on the shoulder of the life jacket body; a heating inner cover; the heating inner cover is arranged inside the life jacket body. The life jacket is provided with a positioning module, which can be tracked by the search and rescue team, and the position of the person in distress can be located in time, so as to facilitate the search and rescue personnel to carry out rescue operations. In addition, during use, the heating inner cover can be activated to effectively slow down the rate of body temperature drop, provide more time for rescue, and prevent the person in distress from losing body temperature too quickly in the water, resulting in a decrease in survival rate; Prior Art 2 (Publication No. CN112722211A, Chinese Patent Published on April 30, 2021) A compact life jacket, including a life jacket front piece made of nylon cloth or rubber as the fabric and filled with buoyancy material in the middle, the front shoulder of the life jacket front piece is connected to the life jacket back piece, the life jacket back piece includes a rear shoulder connected to the life jacket front piece and an air bag portion below the rear shoulder, and the left and right sides of the air bag portion are connected to the left and right sides of the life jacket front piece by an adjustable connecting belt. The compact life jacket using the present invention can not only have sufficient buoyancy to ensure life-saving performance, but also have a smaller volume and reduce storage space; Current life jackets are prone to falling off after being worn due to looseness. Tight-fitting life jackets require more operations in the early stages of donning and tightening, resulting in low donning efficiency, which affects rescue time and the overall ease of use of the life jacket. Summary of the invention

[0003] The object of the present invention is to provide a fire-fighting tight life jacket and a method for wearing and using the same, so as to solve the problems mentioned in the above background technology that the current life jackets are easily loosened and fall off after being worn, and tight life jackets require more operations during the early stage of wearing and tightening, resulting in low wearing efficiency.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fire-fighting tight life jacket, comprising a first floating part and a second floating part, wherein the second floating part is arranged on the left side of the first floating part to provide buoyancy for the user, a connecting belt is arranged on the outer side of the first floating part, and a mounting seat is arranged on the front side of the connecting belt, and a tightening control mechanism is arranged inside the mounting seat to control the tightening of the connecting belt, a positioning sleeve is fixed on the outer side of the first floating part, the connecting belt passes through the positioning sleeve and the positioning sleeve to form a sliding connection, and a through opening is formed by winding at the rear end of the connecting belt, and a through opening is arranged on the outer side of the through opening There is a connecting mechanism, the through port is connected to the second floating part through the connecting mechanism, a flexible belt is fixed on the front side of the second floating part, and a docking block is fixed to the right end of the flexible belt, a docking groove is opened on the left side of the mounting seat, a concave-convex matching structure is formed between the docking groove and the docking block, and a locking mechanism is arranged on the outer side of the docking block, the docking block is inserted into the docking groove to lock the connection between the docking block and the docking groove, a detachable connection is formed between the mounting seat and the first floating part, and a detachable connection is formed between the through port and the connecting mechanism, so that the mounting seat can be installed on different first floating parts for use in conjunction with the second floating part.

[0005] To further optimize the technical solution, a bonding layer is provided on the rear side of the mounting seat, the bonding layer is fixed on the front side of the first floating portion, and a Velcro is provided on the front side of the bonding layer, and the bonding layer is connected to the mounting seat via the Velcro.

[0006] To further optimize the technical solution, the connection mechanism includes a positioning rod, a support seat, a blocking block, a movable shaft and a first torsion spring; A positioning rod extending through the interior of the opening; A support seat is fixed below the positioning rod, and the support seat is fixedly connected to the second floating part; A blocking block is arranged above the positioning rod to block the opening; The movable shaft is fixed on the side of the blocking block, and the lower end of the movable shaft is connected to the supporting seat; The first torsion spring is installed at the end of the movable shaft to provide a rotational restoring force therefor.

[0007] To further optimize the technical solution, a positioner is arranged above the mounting seat, a solar panel is installed on the front side of the mounting seat, and two groups of conductive contacts are arranged below the mounting seat, and the circuit connection of the positioner is connected after the conductive contacts touch water.

[0008] To further optimize the technical solution, the tightening control mechanism includes a winding shaft, a second torsion spring and a rotation limiting mechanism; A reel is rotatably mounted inside the mounting seat, and the front end of the connecting belt is reeled on the surface of the reel; A second torsion spring is installed at the end of the winding shaft to provide a rotational restoring force therefor; The rotation limiting mechanism is arranged at the end of the winding shaft to provide a limiting effect therefor.

[0009] To further optimize the technical solution, the rotation limiting mechanism includes a limiting plate, a friction block, a second return spring, a connecting groove, an extrusion block and a movable block; A limit plate, fixed to the end of the reel; The friction block is arranged on the outer side of the limit plate, and a left-right sliding structure is formed between the friction block and the mounting seat; A second return spring is arranged at the left end of the friction block to provide a leftward pulling force for the friction block; A connecting groove is provided inside the friction block; The extrusion block is arranged inside the connection groove, and the surface of the extrusion block is designed to be inclined; The movable block is fixed at the inner end of the extrusion block, and an up-and-down sliding structure is formed between the movable block and the mounting seat. The inner end of the movable block is located inside the docking groove, and the inner end of the movable block is designed to be inclined.

[0010] To further optimize the technical solution, the locking mechanism includes a limit groove, a clamping block, a first return spring and a control rod; A limiting groove is provided below the docking block; The clamping block is arranged inside the mounting seat, and the left side of the clamping block is designed to be inclined, and a clamping structure is formed between the clamping block and the limiting groove; A first return spring is arranged below the clamping block to provide an upward thrust to the clamping block; The control rod is fixed below the card block to control the movement of the card block, and an up-and-down sliding structure is formed between the control rod and the mounting seat.

[0011] To further optimize the technical solution, a safety mechanism is provided on the outer side of the control rod to limit the movement of the control rod.

[0012] To further optimize the technical solution, the safety mechanism includes a magnetic block, a third return spring, a safety slot, an attraction block and a floating plate; A magnetic block is arranged between the right side of the control rod and the mounting seat to form a left-right sliding structure; A third return spring is fixed on the right side of the magnetic block to provide a rightward pulling force for the magnetic block; A safety slot is provided on the surface of the control rod, and a snap-fit ​​structure is formed between the safety slot and the magnetic block; The attraction block is arranged on the left side of the magnetic block, and the attraction force between the attraction block and the magnetic block is greater than the elastic force of the third return spring, and an up-and-down sliding structure is formed between the attraction block and the mounting seat; The floating plate is fixed on the outside of the attraction block.

[0013] A method for wearing and using a fire-fighting tight life jacket, the specific method steps are as follows: Step 1: Install the mounting seat to the front side of the first floating part, pull the connecting belt out of the mounting seat, pass it through the positioning sleeve, and then connect the connecting belt to the second floating part through the connecting mechanism, so that the first floating part and the second floating part are connected; Step 2: When wearing, the first floating part and the second floating part can be directly wrapped around the chest. When wearing, the second floating part is pulled to drive the connecting belt to unwind, and the enclosing range of the first floating part and the second floating part is adjusted to keep a close and effective connection with the user. Then, the docking block on the second floating part is inserted into the docking groove, and the locking mechanism is used to lock it, so that the enclosing of the first floating part and the second floating part is completed, and the connecting belt is tightened to keep the wearing stability. Step 3: After use or when the first floating part and the second floating part are damaged, the mounting seat and the connecting belt can be removed from the first floating part and the second floating part, and the first floating part and the second floating part can be replaced with different ones for recycling.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) The first floating part and the second floating part form an enclosed wearing method, which is more convenient to wear and can be directly wrapped around. After the first floating part and the second floating part are wrapped around, the connecting belt can be tightened to keep them close to the user and maintain their wearing stability; (2) The mounting seat and the connecting belt are detachable so that the mounting seat and the connecting belt can be removed from the first floating part and the second floating part. When the floating part is damaged, the mounting seat and the connecting belt can be removed and installed on a new floating part for continued use. (3) The life jacket can be quickly donned by plugging and connecting the docking block and the docking slot in conjunction with the locking mechanism. After donning, the life jacket can remain in a tightened state, and the positioner can be triggered to operate after the conductive contact falls into the water. If it does not enter the water, the positioner will not work, which is more energy-efficient. (4) The rotation of the reel is limited by the connection between the friction block and the limit plate, so that the connecting belt of the life jacket maintains a stable unwinding length after being worn, avoiding it from being accidentally stretched and causing relaxation, thereby improving its overall stability; (5) The connection between the magnetic block and the safety slot can limit the movement of the control rod to keep it stable and prevent the docking block from being separated from the docking slot. The movement control of the magnetic block can be driven by the floating board. After falling into the water, the floating board rises to keep the magnetic block and the docking slot connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a rear view structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the top view structure of the present invention; Figure 4 This is a schematic diagram of the rear end structure of the connecting belt of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the support base of the present invention; Figure 6 This is a schematic diagram of the main cross-sectional structure of the mounting seat of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the docking block of the present invention; Figure 8 This is a schematic diagram of the side view structure of the mounting block of the present invention; Fig. 9 It is a schematic diagram of the top view of the limit plate of the present invention; Fig.10 For the present invention Figure 6 The enlarged structural diagram at a in the middle.

[0016] In the figure: 1. first floating part; 2. second floating part; 3. connecting belt; 4. positioning sleeve; 5. flexible belt; 6. mounting seat; 7. through port; 8. positioning rod; 9. supporting seat; 10. blocking block; 11. movable shaft; 12. first torsion spring; 13. bonding layer; 14. Velcro; 15. positioner; 16. solar panel; 17. conductive contact; 18. winding shaft; 19. second torsion spring; 20. docking block; 21. docking groove; 22. limiting groove; 23. card block; 24. first return spring; 25. control rod; 26. limiting disk; 27. friction block; 28. second return spring; 29. ​​connecting groove; 30. extrusion block; 31. movable block; 32. magnetic block; 33. third return spring; 34. safety groove; 35. attraction block; 36. floating plate. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-Figure 10 The present invention provides the following technical solutions: A fire-fighting tight life jacket, comprising a first floating part 1 and a second floating part 2, wherein the second floating part 2 is arranged on the left side of the first floating part 1 to provide buoyancy for the user; Embodiment 1: The invention provides a technical solution, which discloses that a connecting belt 3 is arranged on the outside of the first floating part 1, and a mounting seat 6 is arranged on the front side of the connecting belt 3, and a tightening control mechanism is arranged inside the mounting seat 6 to tighten the connecting belt 3. A positioning sleeve 4 is fixed on the outside of the first floating part 1, and the connecting belt 3 passes through the positioning sleeve 4 and the positioning sleeve 4 forms a sliding connection, and a through hole 7 is formed around the rear end of the connecting belt 3, and a connecting mechanism is arranged on the outside of the through hole 7. The through hole 7 is connected to the second floating part 2 through the connecting mechanism, and the front side of the second floating part 2 is fixed. A flexible belt 5 is fixed, and a docking block 20 is fixed to the right end of the flexible belt 5. A docking groove 21 is opened on the left side of the mounting seat 6. A concave-convex matching structure is formed between the docking groove 21 and the docking block 20, and a locking mechanism is provided on the outer side of the docking block 20. The docking block 20 is inserted into the docking groove 21 to lock the connection between the docking block 20 and the docking groove 21. A detachable connection is formed between the mounting seat 6 and the first floating part 1, and a detachable connection is formed between the through port 7 and the connecting mechanism, so that the mounting seat 6 can be installed on different first floating parts 1 to cooperate with the second floating part 2 for use; A method for wearing and using a fire-fighting tight life jacket, the specific method steps are as follows: Step 1: Install the mounting seat 6 to the front side of the first floating part 1, pull the connecting belt 3 out of the mounting seat 6, pass it through the positioning sleeve 4, and then connect the connecting belt 3 to the second floating part 2 through the connecting mechanism, so that the first floating part 1 and the second floating part 2 are connected; Step 2: When wearing, the first floating part 1 and the second floating part 2 can be directly wrapped around the chest. When wearing, the second floating part 2 is pulled to drive the connecting belt 3 to unwind, and the enclosing range of the first floating part 1 and the second floating part 2 is adjusted to keep a close and effective connection with the user. Then, the docking block 20 on the second floating part 2 is inserted into the docking groove 21, and the locking mechanism is used to lock it, so that the enclosing of the first floating part 1 and the second floating part 2 is completed, and the connecting belt 3 is tightened to keep the wearing stability; Step 3: After use or when the first floating part 1 and the second floating part 2 are damaged, the mounting seat 6 and the connecting belt 3 can be removed from the first floating part 1 and the second floating part 2, and different first floating parts 1 and second floating parts 2 can be replaced for recycling.

[0019] Embodiment 2: On the basis of the first embodiment, a fitting layer 13 is provided on the rear side of the mounting seat 6, the fitting layer 13 is fixed on the front side of the first floating part 1, and a Velcro 14 is provided on the front side of the fitting layer 13, the fitting layer 13 is connected to the mounting seat 6 through the Velcro 14, and the connecting mechanism includes a positioning rod 8, a support seat 9, a blocking block 10, a movable shaft 11 and a first torsion spring 12, the positioning rod 8 passes through the interior of the through opening 7, the support seat 9 is fixed below the positioning rod 8, and the support seat 9 is fixedly connected to the second floating part 2, and the blocking block 10 is arranged on the positioning rod 8. The opening 7 is blocked above the mounting seat 6, the movable shaft 11 is fixed to the side of the blocking block 10, and the lower end of the movable shaft 11 is connected to the support seat 9, the first torsion spring 12 is installed at the end of the movable shaft 11 to provide a rotational reset force for it, a positioner 15 is arranged above the mounting seat 6, and a solar panel 16 is installed on the front side of the mounting seat 6, and two groups of conductive contacts 17 are arranged below the mounting seat 6, and the circuit connection of the positioner 15 is connected after the conductive contact 17 touches the water, and the tightening control mechanism includes a winding shaft 18, a second torsion spring 19 and a rotation limiter The winding shaft 18 is rotatably mounted inside the mounting seat 6, the front end of the connecting belt 3 is wound on the surface of the winding shaft 18, the second torsion spring 19 is mounted on the end of the winding shaft 18 to provide it with a rotational reset force, and the rotational limiting mechanism is arranged at the end of the winding shaft 18 to provide it with a limiting effect. The rotational limiting mechanism includes a limiting plate 26, a friction block 27, a second reset spring 28, a connecting groove 29, an extrusion block 30 and a movable block 31. The limiting plate 26 is fixed to the end of the winding shaft 18, and the friction block 27 is arranged on the outer side of the limiting plate 26, and the friction block A left-right sliding structure is formed between 27 and the mounting seat 6, a second return spring 28 is arranged at the left end of the friction block 27 to provide a leftward pulling force for the friction block 27, a connecting groove 29 is opened inside the friction block 27, an extrusion block 30 is arranged inside the connecting groove 29, and the surface of the extrusion block 30 is designed in an inclined structure, a movable block 31 is fixed at the inner end of the extrusion block 30, and an up-and-down sliding structure is formed between the movable block 31 and the mounting seat 6, and the inner end of the movable block 31 is located inside the docking groove 21, and the inner end of the movable block 31 is designed in an inclined structure; When it is necessary to release the connection between the connecting belt 3 and the second floating part 2, the blocking block 10 can be pushed to move it away from the top of the through hole 7, and the connecting belt 3 can be pulled out from the top of the positioning rod 8 through the through hole 7 to achieve its separation. The solar panel 16 can power the positioner 15. After it falls into the water, the conductive contacts 17 are connected to each other, so that the positioner 15 is powered on and operates, which can reduce the power loss when not in use. The winding shaft 18 can provide a tightening effect on the connecting belt 3 through the second torsion spring 19, so that it can be worn tightly. After the wearing is completed, the docking block 20 is inserted into the docking groove 21, and the movable block 31 is squeezed, so that the movable block 31 pushes the squeezing block 30 to move. The squeezing block 30 pushes the friction block 27 to move through the connecting groove 29, so that the friction block 27 and the limit plate 26 are connected, and the rotation of the winding shaft 18 is limited to prevent it from continuing to rotate, so that it maintains good stability during the wearing process.

[0020] Embodiment three: On the basis of the first embodiment, a locking mechanism is disclosed, which includes a limiting groove 22, a card block 23, a first return spring 24 and a control rod 25. The limiting groove 22 is opened below the docking block 20, the card block 23 is arranged inside the mounting seat 6, and the left side of the card block 23 is designed in an inclined structure, and a locking structure is formed between the card block 23 and the limiting groove 22. The first return spring 24 is arranged below the card block 23 to provide an upward thrust for the card block 23. The control rod 25 is fixed below the card block 23 to control the movement of the card block 23, and an up and down sliding structure is formed between the control rod 25 and the mounting seat 6. A safety mechanism is arranged on the outside of the control rod 25 to limit the movement of the control rod 25. The safety mechanism The mechanism includes a magnetic block 32, a third return spring 33, a safety slot 34, an attraction block 35 and a floating plate 36. The magnetic block 32 is arranged between the right side of the control rod 25 and the mounting seat 6 to form a left-right sliding structure. The third return spring 33 is fixed on the right side of the magnetic block 32 to provide a rightward pulling force for the magnetic block 32. The safety slot 34 is opened on the surface of the control rod 25, and a snap-fit ​​structure is formed between the safety slot 34 and the magnetic block 32. The attraction block 35 is arranged on the left side of the magnetic block 32, and the attraction between the attraction block 35 and the magnetic block 32 is greater than the elastic force of the third return spring 33, and an up-and-down sliding structure is formed between the attraction block 35 and the mounting seat 6, and the floating plate 36 is fixed on the outer side of the attraction block 35. After the docking block 20 is inserted into the docking slot 21, the clamping block 23 and the limit slot 22 are connected, and the docking block 20 is locked in the docking slot 21. When it needs to be released later, the control rod 25 can be pulled to control the clamping block 23 to move. When entering the water after being worn, the floating plate 36 is driven by the buoyancy of the water body to move the attraction block 35, and the attraction block 35 moves to a position relative to the magnetic block 32, attracting the magnetic block 32, so that the magnetic block 32 moves and connects with the safety slot 34, and the movement of the control rod 25 is locked, so that the docking block 21 and the docking slot 20 maintain a stable connection to avoid accidental falling off.

[0021] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0022] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fire-fighting tight life jacket, comprising a first floating part (1) and a second floating part (2), wherein the second floating part (2) is arranged on the left side of the first floating part (1) to provide buoyancy for the user; Features: A connecting belt (3) is arranged on the outside of the first floating part (1), and a mounting seat (6) is arranged on the front side of the connecting belt (3), and a tightening control mechanism is arranged inside the mounting seat (6) to control the tightening of the connecting belt (3). A positioning sleeve (4) is fixed on the outside of the first floating part (1), and the connecting belt (3) passes through the positioning sleeve (4) and forms a sliding connection between the positioning sleeve (4). A through hole (7) is formed around the rear end of the connecting belt (3), and a connecting mechanism is arranged on the outside of the through hole (7). The through hole (7) is connected to the second floating part (2) through the connecting mechanism. A flexible belt (5) is fixed on the front side of the second floating part (2). ), and a docking block (20) is fixed to the right end of the flexible belt (5), a docking groove (21) is provided on the left side of the mounting seat (6), a concave-convex matching structure is formed between the docking groove (21) and the docking block (20), and a locking mechanism is provided on the outer side of the docking block (20), the docking block (20) is inserted into the docking groove (21) to lock the connection between the docking block (20) and the docking groove (21), a detachable connection is formed between the mounting seat (6) and the first floating part (1), and a detachable connection is formed between the through opening (7) and the connecting mechanism, so that the mounting seat (6) can be installed on different first floating parts (1) to cooperate with the second floating part (2) for use.

2. A fire-fighting tight life jacket according to claim 1, characterized in that: The mounting seat (6) is provided with a bonding layer (13) on the rear side thereof, the bonding layer (13) being fixed to the front side of the first floating portion (1), and a Velcro (14) being provided on the front side of the bonding layer (13), the bonding layer (13) being connected to the mounting seat (6) via the Velcro (14).

3. A fire-fighting tight life jacket according to claim 1, characterized in that: The connecting mechanism comprises a positioning rod (8), a supporting seat (9), a blocking block (10), a movable shaft (11) and a first torsion spring (12); A positioning rod (8) passing through the interior of the through opening (7); A support seat (9) is fixed below the positioning rod (8), and the support seat (9) is fixedly connected to the second floating part (2); A blocking block (10) is arranged above the positioning rod (8) to block the opening (7); A movable shaft (11) is fixed to the side of the blocking block (10), and the lower end of the movable shaft (11) is connected to the support seat (9); A first torsion spring (12) is mounted on the end of the movable shaft (11) to provide a rotational restoring force therefor.

4. A fire-fighting tight life jacket according to claim 1, characterized in that: A positioner (15) is arranged above the mounting seat (6), a solar panel (16) is installed on the front side of the mounting seat (6), and two groups of conductive contacts (17) are arranged below the mounting seat (6), and the circuit connection of the positioner (15) is communicated after the conductive contacts (17) touch water.

5. A fire-fighting tight life jacket according to claim 1, characterized in that: The tightening control mechanism comprises a winding shaft (18), a second torsion spring (19) and a rotation limiting mechanism; A reel (18) is rotatably mounted inside the mounting seat (6), and the front end of the connecting belt (3) is reeled onto the surface of the reel (18); A second torsion spring (19) is mounted on the end of the winding shaft (18) to provide a rotational restoring force therefor; A rotation limiting mechanism is arranged at the end of the winding shaft (18) to provide a limiting effect therefor.

6. A fire-fighting tight life jacket according to claim 5, characterized in that: The rotation limiting mechanism comprises a limiting plate (26), a friction block (27), a second return spring (28), a connecting groove (29), a squeezing block (30) and a movable block (31); A limit plate (26) fixed to the end of the reel (18); A friction block (27) is arranged outside the limiting plate (26), and a left-right sliding structure is formed between the friction block (27) and the mounting seat (6); A second return spring (28) is arranged at the left end of the friction block (27) to provide a leftward pulling force for the friction block (27); A connecting groove (29) is provided inside the friction block (27); An extrusion block (30) is arranged inside the connection groove (29), and the surface of the extrusion block (30) is designed to be inclined; The movable block (31) is fixed to the inner end of the extrusion block (30), and an up-and-down sliding structure is formed between the movable block (31) and the mounting seat (6). The inner end of the movable block (31) is located inside the docking groove (21), and the inner end of the movable block (31) is designed to be inclined.

7. A fire-fighting tight life jacket according to claim 1, characterized in that: The locking mechanism comprises a limiting groove (22), a clamping block (23), a first return spring (24) and a control rod (25); A limiting groove (22) is provided below the docking block (20); A clamping block (23) is arranged inside the mounting seat (6), and the left side of the clamping block (23) is designed to be inclined, and a clamping structure is formed between the clamping block (23) and the limiting groove (22); A first return spring (24), arranged below the clamping block (23) to provide an upward thrust for the clamping block (23); The control rod (25) is fixed below the clamping block (23) to control the movement of the clamping block (23), and an up-and-down sliding structure is formed between the control rod (25) and the mounting seat (6).

8. A fire-fighting tight life jacket according to claim 7, characterized in that: A safety mechanism is provided on the outer side of the control rod (25) to limit the movement of the control rod (25).

9. A fire-fighting tight life jacket according to claim 8, characterized in that: The safety mechanism comprises a magnetic block (32), a third return spring (33), a safety slot (34), an attraction block (35) and a floating plate (36); A magnetic block (32) is arranged between the right side of the control rod (25) and the mounting seat (6) to form a left-right sliding structure; A third return spring (33) is fixed to the right side of the magnetic block (32) to provide a rightward pulling force for the magnetic block (32); A safety groove (34) is provided on the surface of the control rod (25), and a snap-fit ​​structure is formed between the safety groove (34) and the magnetic block (32); An attraction block (35) is arranged on the left side of the magnetic block (32), the attraction force between the attraction block (35) and the magnetic block (32) is greater than the elastic force of the third return spring (33), and an up-and-down sliding structure is formed between the attraction block (35) and the mounting seat (6); The floating plate (36) is fixed on the outer side of the attraction block (35).

10. A fire-fighting tight life jacket according to claim 1, characterized in that: A method for wearing and using a life jacket is also disclosed, and the specific method steps are as follows: Step 1: Install the mounting seat (6) to the front side of the first floating part (1), pull the connecting belt (3) out of the mounting seat (6) and pass it through the positioning sleeve (4), and then connect the connecting belt (3) to the second floating part (2) through the connecting mechanism, so that the first floating part (1) and the second floating part (2) are connected; Step 2: When wearing, the first floating part (1) and the second floating part (2) can be directly wrapped around the chest. When wearing, the second floating part (2) is pulled to drive the connecting belt (3) to unwind, and the enclosure range of the first floating part (1) and the second floating part (2) is adjusted so that they maintain a tight and effective connection with the user. Then, the docking block (20) on the second floating part (2) is inserted into the docking groove (21) and locked with the locking mechanism, so that the enclosure of the first floating part (1) and the second floating part (2) is completed, and the connecting belt (3) is tightened to maintain the wearing stability. Step 3: After use or when the first floating part (1) and the second floating part (2) are damaged, the mounting seat (6) and the connecting belt (3) can be removed from the first floating part (1) and the second floating part (2), and replaced with different first floating parts (1) and second floating parts (2) so that they can be recycled.

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