Universal torrent water rescue life jacket

Abstract

The invention relates to the field of water rescue life jackets, and discloses an all-round torrent water rescue life jacket which comprises a main body, an air bag I is fixedly connected to the outer side of the main body, a tightening mechanism is arranged on the inner wall of the main body, a functional pocket is fixedly connected to the front side of the main body, and a rescue mechanism is arranged on the inner wall of the main body. An auxiliary mechanism is arranged on the inner wall of the main body, the tightening mechanism comprises a binding belt, the binding belt is fixedly connected to the inner wall of the main body, a waist belt is slidably connected to the inner wall of the binding belt, the shoulder belt is slidably connected to the inner wall of the waist belt, and a fixing sleeve is fixedly connected to the inner wall of the main body; the inner wall of the fixing sleeve is connected with a shoulder strap in a sliding mode, and the tightening mechanism further comprises a restraining block. Stable wearing of the life jacket is realized, and personal safety accidents caused by separation of the life jacket are reduced.

Description

Technical Field

[0001] This invention relates to the field of water rescue life jackets, specifically an all-purpose rapids water rescue life jacket. Background Technology

[0002] Life jackets generate sufficient buoyancy through inflatable foam or neoprene materials to ensure that the head, face, mouth, and nose of the person falling into the water are above the surface, preventing choking or excessive energy consumption. The buoyancy design reduces the risk of sinking, conserves energy, and allows even swimmers to remain stable in the water, preventing drowning due to exhaustion. This is especially crucial for non-swimmers.

[0003] Patent CN215155535U discloses a life jacket, including a top body and a bottom body. Reflective patches are sewn to both ends of the front surface of the top body. A first side strip is sewn to the bottom edge of the top body, and a second side strip is sewn to the upper edge of the bottom body. The second side strip and the side of the first side strip are bonded together with adhesive and have teeth. The design of a second side strip at the ends of the top and bottom bodies further enhances the life jacket's appeal. The first and second side strips are designed with pull teeth on their sides. The lower teeth can engage the tail ends of the first and second side strips. By pulling the pull head with the pull teeth until the upper teeth are in position, the first and second side strips are closed for use. When the first and second side strips are closed, the top and bottom of the life jacket are also closed for use. However, the above invention is difficult to achieve stable fixation for rescuers during use, which may cause the life jacket to detach during the rescue process and affect the rescue mission. Therefore, an all-purpose whitewater rescue life jacket is proposed to solve the above problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an all-purpose whitewater rescue life jacket that addresses the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an all-purpose whitewater rescue life jacket, comprising a main body, an airbag fixedly connected to the outer side of the main body, a tightening mechanism provided on the inner wall of the main body, a functional pocket fixedly connected to the front side of the main body, a rescue mechanism provided on the inner wall of the main body, an auxiliary mechanism provided on the inner wall of the main body, the tightening mechanism including a restraint strap fixedly connected to the inner wall of the main body, a waist belt slidably connected to the inner wall of the restraint strap, a shoulder strap slidably connected to the inner wall of the waist belt, a fixing sleeve fixedly connected to the inner wall of the main body, a shoulder strap slidably connected to the inner wall of the fixing sleeve, the tightening mechanism further including a restraint block fixedly connected to the top of the shoulder strap, the rear side of the restraint block contacting the front side of the fixing sleeve, an adjusting sleeve fixedly connected to the inner wall of the main body, the inner wall of the adjusting sleeve slidably connected to the circumferential surface of the shoulder strap, and the inner wall of the main body fixedly connected to the adjusting sleeve. A fixed block is connected, and an adjustment plate is rotatably connected to the inner wall of the fixed block. The end of the shoulder strap away from the restraint block is fixedly connected to the rear side of the adjustment plate. When a rescue is needed, the rescuer will wear the life jacket and carry it. When in use, the waist belt is pulled outward along the inner wall of the main body. The waist belt drives the shoulder strap outward, the shoulder strap drives the restraint block downward along the inner wall of the main body, the restraint block drives the fixed sleeve downward, and the fixed sleeve drives the main body to retract. When the main body retracts to the appropriate state, the waist belt is fastened to complete the wearing. The waist belt pulls the shoulder strap and retracts, achieving stable fixation of the person in the lateral and longitudinal directions, avoiding accidents caused by the life jacket coming off during activities. When the waist belt is pulled outward, it drives the shoulder strap to move outward along the inner wall of the adjustment sleeve. The adjustment sleeve drives the adjustment plate to rotate counterclockwise. As the waist belt stretches, it drives the adjustment plate to rotate, releasing the posture adjustment of the life jacket, facilitating the subsequent activities and rescue of the rescuer.

[0006] Preferably, the rescue mechanism includes a tightening sleeve fixedly connected to the inner wall of the main body, a rescue belt slidably connected to the inner wall of the tightening sleeve, and an adjusting sleeve II fixedly connected to the inner wall of the main body. The rescue mechanism also includes a limiting strip I fixedly connected to the rear side of the main body, a limiting strip II fixedly connected to the rear side of the main body, and a limiting strip II slidably connected to the surface of the shoulder strap. A slider is slidably connected to the rear side of the main body, fixedly connected to the end of the shoulder strap away from the restraint block, and slidably connected to the inner wall of the limiting strip I via a spring. A wedge block is fixedly connected to the front side of the slider, and a driven block is fixedly connected to the rear side of the adjusting plate. The wedge block and the driven block are in contact with each other. During water activities, the participant wears this device... When a person unfortunately falls into the water, rescuers wear this invention and carry out the rescue. The rescuer connects the rescue belt to the rescued person's rescue belt, and then swims towards the rescue boat. The rescuer pulls the rescue belt, enabling rescue without physical contact and ensuring the safety of the rescuer. At this time, the rescuer pulls the rescued person's rescue belt, which moves the shoulder strap outward along the inner wall of the adjusting sleeve two. The shoulder strap pulls the slider outward along the inner side of the limiting strip one. The slider moves the inclined block outward, and the inclined block moves the driven block forward along the inclined surface set on the inclined block. The inclined block drives the adjusting plate to rotate clockwise. Pulling the rescue belt simultaneously moves the adjusting plate, causing the rescued person's center of gravity to shift upward, reducing the rescued person's random movement and thus increasing the difficulty of the rescue.

[0007] Preferably, the auxiliary mechanism includes a humidity sensor fixedly connected to the top surface of the main body, a water level sensor fixedly connected to the top surface of the main body, an airbag II fixedly connected to the inner wall of the main body, an air pump disposed inside the airbag II, a cover plate rotatably connected to the front side of the main body, and the front side of the airbag II contacting the rear side of the cover plate. When the humidity sensor and the water level sensor are triggered simultaneously, the humidity sensor and the water level sensor reflect electrical signals to the air pump disposed in the airbag II. The air pump receives the electrical signals and inflates the airbag II. The auxiliary mechanism also includes a spring plate one, which is fixedly connected to the rear side of the main body. An airbag three is fixedly connected to the inner side of the spring plate one. A back plate is fixedly connected to the inner wall of the main body. A spring plate two is fixedly connected to the rear side of the back plate. The rear side of the spring plate two is in contact with the front side of the airbag three. The top end of the spring plate two is fixedly connected to the rear side of the back plate. An L-shaped plate is fixedly connected to the bottom end of the spring plate two. The L-shaped plate is slidably connected to the rear side of the back plate and contacts the rear side of the waist belt. A fixing bolt is fixedly connected to the surface of the L-shaped plate. The waist belt is hinged as a single unit by a fixing bolt, which is slidably connected to the inner wall of the waist belt. If an individual unfortunately falls into the water and cannot swim, improper posture in the water will cause the humidity sensor and water level sensor to become submerged and trigger. These sensors will then send signals to the air pump located in the second airbag. When the air pump receives the signals from both sensors simultaneously, it inflates the second airbag, causing it to move the cover plate. The humidity sensor and water level sensor, in turn, drive the air pump to inflate the second airbag. This system ensures that the mouth and nose of the person who has fallen into the water are above water, guaranteeing their safety. When the person needs emergency treatment, they are placed face up on the ground. At this time, the person's weight presses the airbag three into the body, causing the spring two to stretch. The spring two then moves the L-shaped plate downwards, which in turn moves the fixing bolt downwards, opening the hinge of the waist belt. If the person who has fallen into the water unfortunately has an accident and needs emergency treatment, the airbag three presses the spring two to release the hinge of the waist belt, allowing the life jacket to be quickly removed, facilitating rescue by rescuers.

[0008] The present invention, by adopting the above technical solution, can bring the following beneficial effects: 1. This versatile whitewater rescue life jacket, through the coordinated operation of its restraint belt, waist belt, shoulder straps, fixing sleeve, restraint block, adjusting sleeve, fixing block, and adjusting plate, achieves stable fixation of the person in both the lateral and longitudinal directions by pulling and retracting the shoulder straps with the waist belt. This prevents accidents caused by the life jacket coming off during activities. As the waist belt stretches, it drives the adjusting plate to rotate, releasing the life jacket's posture adjustment and facilitating the subsequent activities and rescues of rescue personnel.

[0009] 2. This versatile whitewater rescue life jacket, through the coordinated operation of the tightening sleeve, rescue belt, adjusting sleeve two, limiting strip one, limiting strip two, slider, inclined block and driven block, allows the rescuer to pull the rescue belt, enabling rescue without physical contact and ensuring the safety of the rescuer. Pulling the rescue belt simultaneously moves the adjusting plate, causing the center of gravity of the rescued person to shift upward, reducing the difficulty of rescue by reducing the random movement of the rescued person.

[0010] 3. This all-purpose whitewater rescue life jacket works in concert with a humidity sensor, water level sensor, airbag two, cover plate, airbag three, spring plate one, back plate, spring plate two, L-shaped plate, and fixing bolt. The humidity sensor and water level sensor drive the air pump to inflate airbag two, ensuring that the mouth and nose of the person falling into the water are above water, thus ensuring the safety of the person. If the person falls into the water and unfortunately has an accident and needs first aid, airbag three presses spring plate two to release the hinge of the waist belt, allowing the life jacket to be quickly removed, facilitating rescue by rescuers. Attached Figure Description

[0011] Figure 1 This is a half-sectional view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the main structure of the present invention; Figure 4 This is a schematic diagram of the tightening mechanism of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of the structure at point A in the middle; Figure 6 This is a schematic diagram of the rescue mechanism structure of the present invention; Figure 7 This is a schematic diagram of the inclined block structure of the present invention; Figure 8 This is a schematic diagram of the auxiliary mechanism structure of the present invention; Figure 9 This is a schematic diagram of the reed II structure of the present invention.

[0012] In the diagram: 1. Main body; 2. Airbag 1; 3. Tightening mechanism; 301. Restraint belt; 302. Waist belt; 303. Shoulder strap; 304. Fixing sleeve; 305. Restraint block; 306. Adjusting sleeve 1; 307. Fixing block; 308. Adjusting plate; 4. Functional pocket; 5. Rescue mechanism; 501. Tightening sleeve; 502. Rescue belt; 503. Adjusting sleeve 2; 504. Limiting strip 1; 505. Limiting strip 2; 506. Sliding block; 507. Inclined block; 508. Driven block; 6. Auxiliary mechanism; 601. Humidity sensor; 602. Water level sensor; 603. Airbag 2; 604. Cover plate; 605. Airbag 3; 606. Spring 1; 607. Back plate; 608. Spring 2; 609. L-shaped plate; 610. Fixing bolt. Detailed Implementation

[0013] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] Please see Figures 1-9 One embodiment of the present invention is: an all-purpose whitewater rescue life jacket, comprising a main body 1, an airbag 2 fixedly connected to the outer side of the main body 1, a tightening mechanism 3 provided on the inner wall of the main body 1, a functional pocket 4 fixedly connected to the front side of the main body 1, a rescue mechanism 5 provided on the inner wall of the main body 1, and an auxiliary mechanism 6 provided on the inner wall of the main body 1. The tightening mechanism 3 includes a restraint strap 301, which is fixedly connected to the inner wall of the main body 1. A waist belt 302 is slidably connected to the inner wall of the restraint strap 301, and a shoulder strap 303 is slidably connected to the inner wall of the waist belt 302. The waist belt 302 pulls the shoulder strap 303 and retracts, achieving stable fixation of the person in the lateral and longitudinal directions, avoiding accidents caused by the life jacket detaching during activities. The inner wall of the main body 1 is fixedly connected to... A fixed sleeve 304 is attached, and a shoulder strap 303 is slidably connected to the inner wall of the fixed sleeve 304. The tightening mechanism 3 also includes a restraint block 305, which is fixedly connected to the top of the shoulder strap 303. The rear side of the restraint block 305 is in contact with the front side of the fixed sleeve 304. An adjusting sleeve 306 is fixedly connected to the inner wall of the main body 1, and the inner wall of the adjusting sleeve 306 is slidably connected to the circumferential surface of the shoulder strap 303. A fixed block 307 is fixedly connected to the inner wall of the main body 1, and an adjusting plate 308 is rotatably connected to the inner wall of the fixed block 307. The end of the shoulder strap 303 away from the restraint block 305 is fixedly connected to the rear side of the adjusting plate 308. When the waist belt 302 is stretched, it drives the adjusting plate 308 to rotate, thereby releasing the posture adjustment of the life jacket and facilitating the subsequent activities and rescue of rescue personnel.

[0015] The rescue mechanism 5 includes a tightening sleeve 501, which is fixedly connected to the inner wall of the main body 1. A rescue belt 502 is slidably connected to the inner wall of the tightening sleeve 501. The rescuer pulls the rescue belt 502, enabling rescue without physical contact and ensuring the safety of the rescuer. An adjusting sleeve 2 503 is fixedly connected to the inner wall of the main body 1. The rescue mechanism 5 also includes a limiting strip 1 504, which is fixedly connected to the rear side of the main body 1. A limiting strip 2 505 is fixedly connected to the rear side of the main body 1 and slidably connected to the shoulder strap 30. 3. On the surface, a slider 506 is slidably connected to the rear side of the main body 1. The slider 506 is fixedly connected to the end of the shoulder strap 303 away from the constraint block 305. The slider 506 is slidably connected to the inner wall of the limit strip 504 by a spring. An inclined block 507 is fixedly connected to the front side of the slider 506. A driven block 508 is fixedly connected to the rear side of the adjustment plate 308. The inclined block 507 and the driven block 508 are in contact with each other. When the rescue belt 502 is pulled, the adjustment plate 308 is driven, so that the center of gravity of the rescued person is moved upward, reducing the random movement of the rescued person and thus increasing the difficulty of rescue by the rescuers.

[0016] Working principle: When a rescue is needed, the rescuer wears the invention and carries one piece. To use it, the waist belt 302 is pulled outwards along the inner wall of the main body 1. The waist belt 302 moves the shoulder straps 303 outwards, which in turn moves the restraint block 305 downwards along the inner wall of the main body 1. The restraint block 305 moves the fixing sleeve 304 downwards, and the fixing sleeve 304 causes the main body 1 to retract. When the main body 1 retracts to the appropriate position, the waist belt 302 is fastened, completing the wearing process. The device is then pulled by the waist belt 302. The shoulder straps 303 retract, achieving stable fixation of the person in both the lateral and longitudinal directions, preventing accidents caused by the life jacket coming off during activities. When the waist belt 302 is pulled outward, it drives the shoulder straps 303 to move outward along the inner wall of the adjusting sleeve 306. The adjusting sleeve 306 drives the adjusting plate 308 to rotate counterclockwise. As the waist belt 302 stretches, it drives the adjusting plate 308 to rotate, releasing the life jacket's posture adjustment and facilitating the subsequent activities and rescues of rescue personnel.

[0017] During water activities, participants wear this invention. If someone falls into the water, rescuers wearing the invention perform the rescue. The rescuer attaches a rescue strap 502 to the rescued person's rescue strap 502, then swims towards the rescue boat. The rescuer pulls the rescue strap 502, enabling a rescue without physical contact and ensuring the safety of the rescuers. At this point, the rescuer pulls the rescued person's rescue strap 502, which in turn moves the shoulder strap 303. The inner wall of the second sleeve 503 moves outward, the shoulder strap 303 pulls the slider 506 to slide outward inside the limit strip 504, the slider 506 drives the inclined block 507 to move outward, the inclined block 507 drives the driven block 508 to move forward along the inclined surface set on the inclined block 507, the inclined block 507 drives the adjusting plate 308 to rotate clockwise, pulling the rescue belt 502 and driving the adjusting plate 308 at the same time, so that the center of gravity of the rescued person moves upward, reducing the random movement of the rescued person and thus increasing the difficulty of rescue by the rescuers.

[0018] Please see Figures 1-9 Based on the above embodiments, in another embodiment of the present invention, the auxiliary mechanism 6 includes a humidity sensor 601, which is fixedly connected to the top surface of the main body 1. A water level sensor 602 is fixedly connected to the top surface of the main body 1. An airbag 603 is fixedly connected to the inner wall of the main body 1. An air pump is installed inside the airbag 603. The humidity sensor 601 and the water level sensor 602 drive the air pump to inflate the airbag 603, ensuring that the mouth and nose of the person who falls into the water are above the water, thus ensuring the safety of the person. A cover plate 604 is rotatably connected to the front side of the main body 1. The front side of the airbag 603 is in contact with the rear side of the cover plate 604. When the humidity sensor 601 and the water level sensor 602 are triggered simultaneously, they reflect an electrical signal to the air pump installed in the airbag 603. The air pump receives the electrical signal and inflates the airbag 603. The auxiliary mechanism 6 also includes a spring 606. Spring 606 is fixedly connected to the rear side of the main body 1. Airbag 605 is fixedly connected to the inner side of spring 606. Back plate 607 is fixedly connected to the inner wall of the main body 1. Spring 608 is fixedly connected to the rear side of back plate 607. The rear side of spring 608 is in contact with the front side of airbag 605. The top end of spring 608 is fixedly connected to the rear side of back plate 607. L-shaped plate 609 is fixedly connected to the bottom end of spring 608. L-shaped plate 609 slides. Connected to the rear side of the back plate 607, the L-shaped plate 609 contacts the rear side of the waist belt 302. A fixing bolt 610 is fixedly connected to the surface of the L-shaped plate 609. The waist belt 302 is hinged together by the fixing bolt 610. The fixing bolt 610 is slidably connected to the inner wall of the waist belt 302. If a person falls into the water and unfortunately has an accident and needs emergency rescue, the airbag 605 presses the spring 608 to release the hinge of the waist belt 302, so that the life jacket can be quickly taken off, which is convenient for rescuers to carry out rescue.

[0019] Working principle: When a person unfortunately falls into the water and cannot swim, their improper posture in the water will cause the humidity sensor 601 and water level sensor 602 to become submerged and trigger. The humidity sensor 601 and water level sensor 602 will send signals to the air pump installed in the second airbag 603. When the air pump receives the signals from the humidity sensor 601 and water level sensor 602 simultaneously, the air pump will operate, inflating the second airbag 603. The second airbag 603 will then move the cover plate 604, and the humidity sensor 601 and water level sensor 602 will drive the air pump to inflate the second airbag 603, ensuring that the mouth and nose of the person who fell into the water are above the water, thus ensuring their safety. For the safety of personnel, when a person in need of first aid is required, the person should be placed face up on the ground. At this time, the weight of the person will press the airbag 605 into the body 1. The airbag 605 will cause the spring 608 to stretch, and the spring 608 will cause the L-shaped plate 609 to move downward. The L-shaped plate 609 will cause the fixing bolt 610 to move downward, opening the hinge of the waist belt 302. If a person who has fallen into the water unfortunately has an accident and needs first aid, the person lying flat in the water will press the airbag 605, causing the airbag 605 to press the spring 608 to release the hinge of the waist belt 302, so that the life jacket can be quickly removed, facilitating rescue by rescuers.

[0020] This invention provides a versatile whitewater rescue life jacket. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of the invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technologies.

Claims

1. A versatile whitewater rescue life jacket, comprising a main body (1), characterized in that; An airbag (2) is fixedly connected to the outer side of the main body (1), a tightening mechanism (3) is provided on the inner wall of the main body (1), a functional pocket (4) is fixedly connected to the front side of the main body (1), a rescue mechanism (5) is provided on the inner wall of the main body (1), and an auxiliary mechanism (6) is provided on the inner wall of the main body (1). The tightening mechanism (3) includes a binding strap (301), which is fixedly connected to the inner wall of the main body (1). A waist belt (302) is slidably connected to the inner wall of the binding strap (301), and a shoulder strap (303) is slidably connected to the inner wall of the waist belt (302). A fixing sleeve (304) is fixedly connected to the inner wall of the main body (1), and a shoulder strap (303) is slidably connected to the inner wall of the fixing sleeve (304).

2. The all-purpose whitewater rescue life jacket according to claim 1, characterized in that... The tightening mechanism (3) also includes a constraint block (305), which is fixedly connected to the top of the shoulder strap (303). The rear side of the constraint block (305) is in contact with the front side of the fixing sleeve (304). An adjustment sleeve (306) is fixedly connected to the inner wall of the main body (1). The inner wall of the adjustment sleeve (306) is slidably connected to the circumferential surface of the shoulder strap (303). A fixing block (307) is fixedly connected to the inner wall of the main body (1). An adjustment plate (308) is rotatably connected to the inner wall of the fixing block (307). One end of the shoulder strap (303) away from the constraint block (305) is fixedly connected to the rear side of the adjustment plate (308).

3. The all-purpose whitewater rescue life jacket according to claim 2, characterized in that: The rescue mechanism (5) includes a tightening sleeve (501), which is fixedly connected to the inner wall of the main body (1). A rescue belt (502) is slidably connected to the inner wall of the tightening sleeve (501), and an adjusting sleeve (503) is fixedly connected to the inner wall of the main body (1).

4. The all-purpose whitewater rescue life jacket according to claim 3, characterized in that: The rescue mechanism (5) also includes a limiting strip one (504), which is fixedly connected to the rear side of the main body (1). A limiting strip two (505) is fixedly connected to the rear side of the main body (1). The limiting strip two (505) is slidably connected to the surface of the shoulder strap (303). A slider (506) is slidably connected to the rear side of the main body (1). The slider (506) is fixedly connected to the end of the shoulder strap (303) away from the constraint block (305). The slider (506) is slidably connected to the inner wall of the limiting strip one (504) by a spring. A wedge block (507) is fixedly connected to the front side of the slider (506). A driven block (508) is fixedly connected to the rear side of the adjustment plate (308). The wedge block (507) and the driven block (508) are in contact with each other.

5. A versatile whitewater rescue life jacket according to claim 4, characterized in that: The auxiliary mechanism (6) includes a humidity sensor (601), which is fixedly connected to the top surface of the main body (1). A water level sensor (602) is fixedly connected to the top surface of the main body (1). An airbag (603) is fixedly connected to the inner wall of the main body (1). An air pump is installed inside the airbag (603).

6. A versatile whitewater rescue life jacket according to claim 5, characterized in that: The front side of the main body (1) is rotatably connected to a cover plate (604). The front side of the second airbag (603) is in contact with the rear side of the cover plate (604). When the humidity sensor (601) and the water level sensor (602) are triggered simultaneously, the humidity sensor (601) and the water level sensor (602) reflect electrical signals to the air pump installed in the second airbag (603). The air pump receives the electrical signals and inflates the second airbag (603).

7. A versatile whitewater rescue life jacket according to claim 6, characterized in that: The auxiliary mechanism (6) also includes a spring plate one (606), which is fixedly connected to the rear side of the main body (1). An airbag three (605) is fixedly connected to the inner side of the spring plate one (606). A back plate (607) is fixedly connected to the inner wall of the main body (1). A spring plate two (608) is fixedly connected to the rear side of the back plate (607). The rear side of the spring plate two (608) is in contact with the front side of the airbag three (605). The top end of the spring plate two (608) is fixedly connected to the rear side of the back plate (607).

8. A versatile whitewater rescue life jacket according to claim 7, characterized in that: The bottom end of the second spring (608) is fixedly connected to an L-shaped plate (609), which is slidably connected to the back plate (607) and contacts the back side of the waist belt (302). A fixing bolt (610) is fixedly connected to the surface of the L-shaped plate (609), and the waist belt (302) is hinged together by the fixing bolt (610). The fixing bolt (610) is slidably connected to the inner wall of the waist belt (302).

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