Metal mine head safety protection device

Abstract

The utility model discloses a kind of head safety protection devices for metal mine, which belongs to the technical field of safety protection device.It mainly includes: helmet, face guard, lighting mechanism, lacing, traction mechanism, traction piece, the helmet includes shell, recess, the shell is provided with recess matched with head, the helmet one end is equipped with face guard, the helmet two opposite ends each installation lighting mechanism, the helmet and face guard opposite another end is equipped with traction piece, two the lighting mechanism is located in the two sides of face guard and traction piece.The utility model is separated by setting face guard and lighting mechanism and is convenient to use, the angle of flashlight illumination can be adjusted by using the plug-in of different angles of insertion rod and insertion hole, the cooperation plug-in of through hole and protrusion can be locked in time after adjusting the angle of face guard, by setting detachable goggles, different environmental needs are met.The utility model is mainly used for the head safety protection of mine worker.

Description

Technical Field

[0001] This utility model belongs to the technical field of safety protection devices, and more specifically, it relates to a head safety protection device for metal mines. Background Technology

[0002] Helmets are a common type of head protection device, widely used in daily life and production due to their portability, ease of wear, and good protective effect. However, depending on the environment, some helmet structures differ; for example, driving helmets usually have a face shield, while ordinary fall protection helmets do not. Chinese utility model patent application number 202323666088.4 provides a multi-functional safety helmet for coal mines. This patent claims that "by setting up a face shield, goggles, and transparent lenses, it can provide safety protection for workers' eyes and prevent dust from harming their eyes." However, it has the following shortcomings: First, the goggles and auxiliary lighting are connected to the face shield, causing the helmet's center of gravity to tilt forward. When working while wearing a safety helmet, workers often bend over, making it easy for the helmet to slip forward and slide down. When workers straighten up and look straight ahead, they need to reach up and readjust the helmet. First, it is inconvenient to use; second, the auxiliary light is connected to the mask, and the auxiliary light moves with the mask when it is turned, which means that it cannot provide lighting when the mask needs to be opened briefly (e.g., to wipe the face and eyelids), thus failing to meet the needs of use; third, the mask lacks a locking mechanism, and cannot be locked in time after adjusting its angle relative to the outer cap, making it difficult to meet various needs; fourth, it only has one type of transparent lens, which is difficult to meet the needs of the complex use environment in mining, such as normal production and welding operations; fifth, the lighting angle of the auxiliary light cannot be adjusted, and the lighting range is relatively small, making it difficult to meet the needs of complex mining operations. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a head safety protection device for metal mines. It is convenient to use by setting up a separate mask and lighting mechanism. The angle of the flashlight can be adjusted by using the insertion of the rod and the insertion hole at different angles. The angle of the mask can be locked in time after the through hole and the protrusion are matched and inserted. By setting up a detachable protective lens, it can meet the needs of different environments.

[0004] A head safety protection device for metal mines includes a helmet, a face mask, a lighting mechanism, a strap, a traction mechanism, and a traction component. The helmet includes a shell and a recess. The shell has a recess that matches the head. A face mask is installed at one end of the helmet and can swing along the outer contour of the shell. The face mask is made of transparent material. Lighting mechanisms are installed at two opposite ends of the helmet. The helmet has adjustable straps that correspond to the recess, and the straps and recess together surround the head. The traction mechanism is opposite to the recess and is further away from the recess than the straps. The traction mechanism is installed on or worn by the person wearing the helmet. A traction component is installed at the other end of the helmet opposite the face mask. The traction component is installed with the traction mechanism to pull the shell. The two lighting mechanisms are located on either side of the face mask and the traction component.

[0005] Preferably, the face mask is provided with a slot into which a protective lens is inserted. The protective lens is made of polycarbonate, transparent anti-glare glass, or yellow-green tinted glass. The protective lens is inserted into the slot from top to bottom. A limiting strip is fixed to the outside of the protective lens, and the limiting strip cannot pass through the slot.

[0006] Preferably, the inner wall of the recess is covered with a plurality of cushioning pads, the cushioning pads being sponges or air bags, and ventilation gaps are left between the cushioning pads.

[0007] Preferably, the helmet further includes protective plates, through holes, and receiving gaps. Protective plates are integrally formed at both ends of the shell. The two protective plates are arranged opposite each other and are located on the same side of the shell relative to the two lighting mechanisms. The protective plates have multiple through holes, and receiving gaps are left between the buffer pad and the protective plates.

[0008] Preferably, each of the two protective plates is fixed with a support shaft, the two support shafts are coaxially arranged and hinged to the mask, and the mask swings relative to the outer contour of the shell through the hinge with the support shaft.

[0009] Preferably, the through holes of the two protective plates are arranged at equal circumferential angles relative to the support shaft. The mask is fixed with two sets of elastic plates, which are respectively arranged opposite to the two protective plates. The two elastic plates form a set. The end faces of the two sets of elastic plates opposite to the two protective plates are respectively fixed with dome-shaped protrusions. The protrusions can be matched and inserted into any through hole to limit the angular position of the mask relative to the shell. The two support shafts are respectively detachably installed with limiting seats. The two limiting seats abut against the outer wall of the mask to prevent the mask from moving away from the protective plates along the support shaft.

[0010] Preferably, the lighting mechanism includes a flashlight, a threaded hole, and a blind hole. The end of the limiting seat near the face mask has a threaded hole, and the end away from the face mask has a blind hole. The threaded hole and the blind hole are coaxially arranged. One end of the flashlight is provided with an illumination LED, and the other end is provided with a self-resetting button switch. The LED and the self-resetting button switch are arranged opposite each other. The flashlight contains a battery and a control circuit. The LED, the self-resetting button switch, the battery, and the control circuit are electrically connected. Pressing the self-resetting button switch can turn the LED on and off. The flashlight is detachably threaded to the threaded hole and interlocked with the blind hole. The self-resetting button switch can be abutted by the bottom of the blind hole.

[0011] Preferably, the support shaft has a regular polygonal prism-shaped insertion hole coaxially opened at its axial end, the insertion hole having no less than 10 side edges, the limiting seat is fixed with an insertion rod that matches the insertion hole, the insertion rod is inserted into the insertion hole, the limiting seat is through-inserted with a mounting bolt, and the mounting bolt is threadedly connected to the support shaft.

[0012] Preferably, the traction mechanism includes shoulder straps, back straps, chest straps, and connecting seats. The two shoulder straps are arranged opposite each other and are used to be worn on the arms of the person wearing the shell near the shoulders. The two shoulder straps are connected to the back straps and chest straps. The back straps correspond to the back and the chest straps correspond to the chest. The connecting seats are threaded through the back straps and are installed with the traction components.

[0013] Preferably, the helmet further includes support buckles, with support buckles fixed to each of the two protective plates, and support buckles also fixed to the ends of the shell opposite to the face mask. The traction device, straps, back straps, and chest strap each include a main strap, a secondary strap, a connecting buckle, Velcro fasteners, and Velcro fasteners. The main strap of the traction device is bound to the support buckle of the shell, the secondary strap of the traction device is bound to the connecting seat, the secondary strap of the strap is bound to one of the support buckles of the two protective plates, and the main strap of the strap is bound to the other support buckle of the two protective plates. The main strap and secondary strap of the back strap are fixed to the two shoulder straps, and the main strap and secondary strap of the chest strap are fixed to the two shoulder straps. Each secondary strap is bound with a connecting buckle, and Velcro fasteners and Velcro fasteners are fixed at intervals on the same side of each main strap. The main strap can pass through the connecting buckle and the length of the traction device, straps, back straps, or chest strap can be adjusted by the cooperation and adhesion of the Velcro fasteners and Velcro fasteners.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. The transparent face mask provides ample visibility without carrying too many components, resulting in a lighter weight and preventing the helmet from sagging forward and downward. The two lighting mechanisms are separate from the face mask, so they do not interfere with each other and do not make the face mask too heavy. They also provide a wider lighting range. In conjunction with the traction mechanism and traction device, the helmet shell can be pulled, further reducing the occurrence of the helmet sagging forward and downward. It is easy to use.

[0015] 2. By setting up protective lenses, it can adapt to the welding working environment, while removing the protective lenses can meet normal production needs. By setting limit strips, it prevents the protective lenses from falling out of the slot and facilitates dragging the protective lenses to detach them from the slot.

[0016] 3. The through hole can not only be used to allow sound to propagate, but also can be used in conjunction with the protrusion to limit the angle of the mask relative to the shell; by changing the insertion angle of the rod and the hole, the vertical angle of the limit seat and the flashlight relative to the helmet can be adjusted to meet different lighting needs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the isometric structure of this utility model; Figure 2 This is a schematic diagram of the rear structure of this utility model; Figure 3 This is a schematic diagram showing the connection between the flashlight and the limiting seat; Figure 4 A schematic diagram showing the fit between the limit seat, support shaft, face shield, and flashlight; In the diagram, 1. Helmet; 2. Face mask; 3. Lighting mechanism; 4. Straps; 5. Traction mechanism; 6. Traction component; 7. Shell; 8. Recess; 9. Slot; 10. Goggles; 11. Limiting strip; 12. Cushion; 13. Protective plate; 14. Through hole; 15. Support shaft; 16. Elastic plate; 17. Protrusion; 18. Limiting seat; 19. Flashlight; 20. Threaded hole; 21. Blind hole; 22. LED bead; 23. Self-resetting button switch; 24. Socket; 25. Insert rod; 26. Mounting bolt; 27. Shoulder strap; 28. Back strap; 29. ​​Chest strap; 30. Connecting seat; 31. Support buckle; 32. Main strap; 33. Secondary strap; 34. Connecting buckle; 35. Velcro; 36. Velcro; 37. Ventilation gap; 38. Accommodation gap. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings: The directional terms used in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application based on the visual orientation shown in the accompanying drawings. Unless otherwise expressly specified and limited, the terms "setting," "installation," "connection," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] like Figures 1-4 As shown, a head safety protection device for metal mines includes a helmet 1, a face mask 2, a lighting mechanism 3, a strap 4, a traction mechanism 5, and a traction component 6. The helmet 1 includes a shell 7 and a recess 8. The shell 7 has a recess 8 that matches the head. The face mask 2 is installed at one end of the helmet 1 and can swing along the outer contour of the shell 7. The face mask 2 is made of transparent material. Lighting mechanisms 3 are installed at two opposite ends of the helmet 1. The helmet 1 is equipped with adjustable straps 4, which correspond to the recess 8. The straps 4 and the recess 8 together surround the head. The traction mechanism 5 is opposite to the recess 8 and is further away from the recess 8 than the straps 4. The traction mechanism 5 is installed on or worn by the person wearing the shell 7. The traction component 6 is installed at the other end of the helmet 1 opposite to the face mask 2. The traction component 6 is installed with the traction mechanism 5 to pull the shell 7. The two lighting mechanisms 3 are located on both sides of the face mask 2 and the traction component 6.

[0020] When in use, wear the traction mechanism 5, or install the traction mechanism 5 with clothing, then wear the shell 7, and adjust the tightness of the strap 4 so that the strap 4 is located below the jawbone, and together with the recess 8, it surrounds the head. The transparent mask 2 can provide a sufficient field of vision environment without carrying too many parts, resulting in a lighter weight and preventing the shell 7 from falling forward and downward severely. The two lighting mechanisms 3 are set separately from the mask 2 and do not affect each other, so as not to make the mask 2 too heavy, and the lighting range is wider. In conjunction with the traction mechanism 5 and the traction component 6, the shell 7 can be pulled, further reducing the occurrence of the helmet 1 falling forward and downward.

[0021] The face mask 2 is provided with a slot 9, into which a protective lens 10 is inserted. The protective lens 10 is made of polycarbonate, transparent anti-glare glass, or yellow-green tinted glass. The protective lens 10 is inserted into the slot 9 from top to bottom. A limiting strip 11 is fixed to the outside of the protective lens 10, and the limiting strip 11 cannot pass through the slot 9.

[0022] Furthermore, by setting the protective lens 10, it can adapt to the welding working environment, while removing the protective lens 10 can meet the normal production needs. By setting the limiting strip 11, the protective lens 10 is prevented from falling off the slot 9 and it is easy to drag the protective lens 10 to detach it from the slot 9.

[0023] Multiple buffer pads 12 are laid and fixed on the inner wall of the recess 8. The buffer pads 12 are sponges or air bags, and ventilation gaps 37 are left between the buffer pads 12.

[0024] Furthermore, by setting up the buffer pad 12, the protective effect can be improved, especially when an airbag is used as the buffer pad 12, the protective effect is even better, while the ventilation gap 37 facilitates ventilation, thereby improving comfort.

[0025] The helmet 1 also includes a protective plate 13, through holes 14, and a receiving gap 38. The protective plates 13 are integrally formed at both ends of the shell 7. The two protective plates 13 are arranged opposite each other and are located on the same side of the shell 7 relative to the two lighting mechanisms 3. The protective plates 13 have multiple through holes 14. A receiving gap 38 is left between the buffer pad 12 and the protective plate 13.

[0026] Furthermore, the ear can be protected by the protective plate 13, while the receiving gap 38 provides space for the ear, and the through hole 14 facilitates the propagation of sound.

[0027] Each of the two protective plates 13 is fixed with a support shaft 15. The two support shafts 15 are coaxially arranged and hinged to the mask 2. The mask 2 swings relative to the outer contour of the shell 7 through the hinge with the support shaft 15.

[0028] The through holes 14 of the two protective plates 13 are arranged at equal angles to the support shaft 15. The mask 2 is fixed with two sets of elastic plates 16, which are respectively arranged opposite to the two protective plates 13. The two elastic plates 16 form a group. The end faces of the two sets of elastic plates 16 opposite to the two protective plates 13 are respectively fixed with dome-shaped protrusions 17. The protrusions 17 can be matched and inserted into any through hole 14 to limit the angular position of the mask 2 relative to the shell 7. The two support shafts 15 are respectively detachably installed with limiting seats 18. The two limiting seats 18 abut against the outer wall of the mask 2 to prevent the mask 2 from moving away from the protective plates 13 along the support shaft 15.

[0029] Furthermore, the through hole 14 can not only be used to allow sound to propagate, but also cooperate with the protrusion 17 to limit the angle of the mask 2 relative to the housing 7. For example, when face protection is required, the mask 2 can be lowered to provide face protection. When face protection is not required, such as when resting in a rest area away from the work area, the mask 2 can be temporarily swung upward to make the area around the face open, so as to meet the needs of smoking, washing face, etc. The limiting seat 18 can also be used to hang the elastic band of the mask.

[0030] The lighting mechanism 3 includes a flashlight 19, a threaded hole 20, and a blind hole 21. The end of the limiting seat 18 near the mask 2 has a threaded hole 20, and the end away from the mask 2 has a blind hole 21. The threaded hole 20 and the blind hole 21 are coaxially arranged. One end of the flashlight 19 is provided with an illumination LED 22, and the other end is provided with a self-resetting button switch 23. The LED 22 and the self-resetting button switch 23 are arranged opposite to each other. The flashlight 19 contains a battery and a control circuit. The LED 22, the self-resetting button switch 23, the battery, and the control circuit are electrically connected. Pressing the self-resetting button switch 23 can turn the LED 22 on or off. The flashlight 19 is detachably threadedly connected to the threaded hole 20 and is interlocked with the blind hole 21. The self-resetting button switch 23 can be pressed by the bottom of the blind hole 21.

[0031] Furthermore, by manually rotating the flashlight 19, it can not only be disassembled and assembled, but also easily pressed and released from the self-reset button switch 23, thus conveniently controlling whether the light is on or off. This type of flashlight 19 is common in the market and can be purchased, so there is no need to describe its detailed structure in detail.

[0032] The support shaft 15 has a regular polygonal prism-shaped insertion hole 24 coaxially opened at its axial end. The insertion hole 24 has not less than 10 side edges. The limiting seat 18 is fixed with an insertion rod 25 that matches the insertion hole 24. The insertion rod 25 is inserted into the insertion hole 24. The limiting seat 18 is through-inserted with a mounting bolt 26. The mounting bolt 26 is threadedly connected to the support shaft 15.

[0033] Furthermore, by changing the insertion angle between the plug rod 25 and the socket 24, the vertical angle of the limit seat 18 and the flashlight 19 relative to the helmet 1 can be adjusted, thereby meeting different lighting needs.

[0034] The traction mechanism 5 includes shoulder straps 27, back straps 28, chest straps 29, and connecting seats 30. The two shoulder straps 27 are arranged opposite each other and are used to be worn on the arms of the person wearing the shell 7 near the shoulders. The two shoulder straps 27 are connected to the back straps 28 and the chest straps 29. The back straps 28 correspond to the back and the chest straps 29 correspond to the chest. The connecting seats 30 are threaded through the back straps 28 and are installed with the traction component 6.

[0035] The helmet 1 also includes support buckles 31. Support buckles 31 are fixed to both of the two protective plates 13. Support buckles 31 are also fixed to the ends of the shell 7 opposite to the face mask 2. The traction component 6, strap 4, back strap 28, and chest strap 29 each include a main strap 32, a secondary strap 33, a connecting buckle 34, Velcro fasteners 35, and Velcro fasteners 36. The main strap 32 of the traction component 6 is bound to the support buckle 31 where the shell 7 is located. The secondary strap 33 of the traction component 6 is bound to the connecting seat 30. The secondary strap 33 of the strap 4 is bound to one of the support buckles 31 where the two protective plates 13 are located. The main strap 32 of the strap 4 is tied to the other support buckle 31 where the two protective plates 13 are located. The main strap 32 and the auxiliary strap 33 of the back strap 28 are fixed to the two shoulder straps 27 respectively. The main strap 32 and the auxiliary strap 33 of the chest strap 29 are fixed to the two shoulder straps 27 respectively. Each of the auxiliary straps 33 is tied with a connecting buckle 34. Each of the main straps 32 has Velcro 35 and Velcro 36 fixed at intervals on the same side. The main strap 32 can pass through the connecting buckle 34 and be glued by the cooperation of the Velcro 35 and Velcro 36 to realize the length adjustment of the traction member 6, the strap 4, the back strap 28 or the chest strap 29.

[0036] By changing the bonding position of the Velcro 35 and Velcro 36, the length of the traction component 6, the strap 4, the back strap 28 or the chest strap 29 can be adjusted to meet the needs of people with different body sizes. The separate Velcro 35 and Velcro 36 make it more convenient to wear the traction component 6, the strap 4, the back strap 28 or the chest strap 29.

[0037] Finally, although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A head safety protection device for metal mines, comprising a helmet (1), a face mask (2), a lighting mechanism (3), a strap (4), a traction mechanism (5), and a traction component (6), wherein the helmet (1) comprises a shell (7) and a recess (8), the shell (7) having a recess (8) matching the head, the face mask (2) being mounted on one end of the helmet (1), the face mask (2) being able to swing along the outer contour of the shell (7), and the face mask (2) being made of transparent material, characterized in that, The helmet (1) has a lighting mechanism (3) installed at each of its two opposite ends. The helmet (1) is equipped with a strap (4) that can be adjusted in length. The strap (4) corresponds to the recess (8). The strap (4) and the recess (8) together surround the head. The traction mechanism (5) is opposite to the recess (8) and is further away from the recess (8) than the strap (4). The traction mechanism (5) is installed on the clothing of the person wearing the shell (7) or worn by the person wearing the shell (7). The other end of the helmet (1) opposite to the mask (2) is equipped with a traction member (6). The traction member (6) is installed with the traction mechanism (5) to traction the shell (7). The two lighting mechanisms (3) are located on both sides of the mask (2) and the traction member (6).

2. The head safety protection device for metal mines according to claim 1, characterized in that: The face mask (2) is provided with a slot (9), into which a protective lens (10) is inserted. The protective lens (10) is made of polycarbonate, transparent anti-glare glass or yellow-green colored glass. The protective lens (10) is inserted into the slot (9) from top to bottom. A limiting strip (11) is fixed to the outside of the protective lens (10). The limiting strip (11) cannot pass through the slot (9).

3. The head safety protection device for metal mines according to claim 1, characterized in that: The inner wall of the recess (8) is covered with a number of buffer pads (12), which are sponges or air bags, and ventilation gaps (37) are left between the buffer pads (12).

4. A head safety protection device for metal mines according to claim 3, characterized in that: The helmet (1) also includes a protective plate (13), through holes (14), and a receiving gap (38). The protective plates (13) are integrally formed at both ends of the shell (7). The two protective plates (13) are arranged opposite each other and are located on the same side of the shell (7) relative to the two lighting mechanisms (3). The protective plates (13) have multiple through holes (14). A receiving gap (38) is left between the buffer pad (12) and the protective plate (13).

5. A head safety protection device for metal mines according to claim 4, characterized in that: The two protective plates (13) are respectively fixed with support shafts (15). The two support shafts (15) are coaxially arranged and hinged to the mask (2). The mask (2) swings relative to the outer contour of the shell (7) through the hinge with the support shafts (15).

6. A head safety protection device for metal mines according to claim 5, characterized in that: The through holes (14) where the two protective plates (13) are located are arranged at equal angles to the support shaft (15). The mask (2) is fixed with two sets of elastic plates (16). The two sets of elastic plates (16) are respectively arranged opposite to the two protective plates (13). The two elastic plates (16) form a set. The end faces of the two sets of elastic plates (16) opposite to the two protective plates (13) are respectively fixed with dome-shaped protrusions (17). The protrusions (17) can be matched and inserted with any through hole (14) to limit the angle position of the mask (2) relative to the shell (7). The two support shafts (15) are respectively detachably installed with limiting seats (18). The two limiting seats (18) abut against the outer wall of the mask (2) to prevent the mask (2) from moving away from the protective plate (13) along the support shaft (15).

7. A head safety protection device for metal mines according to claim 6, characterized in that: The lighting mechanism (3) includes a flashlight (19), a threaded hole (20), and a blind hole (21). The end of the limiting seat (18) near the mask (2) has a threaded hole (20) and the end away from the mask (2) has a blind hole (21). The threaded hole (20) and the blind hole (21) are coaxially arranged. One end of the flashlight (19) is provided with an illumination bulb (22), and the other end is provided with a self-resetting button switch (23). The bulb (22) and the self-resetting button switch (23) In a relative configuration, the flashlight (19) is equipped with a battery and a control circuit. The lamp (22), the self-reset button switch (23), the battery and the control circuit are electrically connected. The lamp (22) can be turned on or off by pressing the self-reset button switch (23). The flashlight (19) is detachably threaded to the threaded hole (20) and is interlocked with the blind hole (21). The self-reset button switch (23) can be pressed by the bottom of the blind hole (21).

8. A head safety protection device for metal mines according to claim 7, characterized in that: The support shaft (15) has a regular polygonal prism-shaped insertion hole (24) coaxially opened at its axial end. The number of side edges of the insertion hole (24) is ≥10. The limiting seat (18) is fixed with an insertion rod (25) that matches the insertion hole (24). The insertion rod (25) is inserted into the insertion hole (24). The limiting seat (18) is through-inserted with a mounting bolt (26). The mounting bolt (26) is threadedly connected to the support shaft (15).

9. A head safety protection device for metal mines according to any one of claims 4 to 8, characterized in that: The traction mechanism (5) includes a shoulder strap (27), a back strap (28), a chest strap (29), and a connecting seat (30). The two shoulder straps (27) are arranged opposite each other and are used to be worn on the arms of the person wearing the shell (7) near the shoulders. The two shoulder straps (27) are connected to the back strap (28) and the chest strap (29). The back strap (28) corresponds to the back and the chest strap (29) corresponds to the chest. The back strap (28) is threaded through the connecting seat (30), and the connecting seat (30) is installed with the traction component (6).

10. A head safety protection device for metal mines according to claim 9, characterized in that: The helmet (1) also includes a support buckle (31), and the two protective plates (13) are respectively fixed with support buckles (31). The shell (7) and the end opposite to the face mask (2) are also fixed with support buckles (31). The traction member (6), the strap (4), the back strap (28) and the chest strap (29) respectively include a main strap (32), a secondary strap (33), a connecting buckle (34), a Velcro closure (35) and a Velcro closure (36). The main strap (32) of the traction member (6) is bound to the support buckle (31) of the shell (7). The secondary strap (33) of the traction member (6) is bound to the connecting seat (30). The secondary strap (33) of the strap (4) is bound to one of the support buckles (31) of the two protective plates (13). The main strap (32) of the strap (4) is tied to the other support buckle (31) where the two guard plates (13) are located. The main strap (32) and the auxiliary strap (33) of the back strap (28) are fixed to the two shoulder straps (27). The main strap (32) and the auxiliary strap (33) of the chest strap (29) are fixed to the two shoulder straps (27). Each of the auxiliary straps (33) is tied with a connecting buckle (34). Each of the main straps (32) has Velcro (35) and Velcro (36) fixed at intervals on the same side. The main strap (32) can pass through the connecting buckle (34) and achieve length adjustment of the traction member (6), strap (4), back strap (28) or chest strap (29) by the cooperation and bonding of Velcro (35) and Velcro (36).

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