Multifunctional backpack

Abstract

The invention relates to the technical field of bags and suitcases, in particular to a multifunctional knapsack which comprises a binding structure and two protection knapsack bodies fixedly sewn to the side face of the binding structure, the two protection knapsack bodies are symmetrically distributed on the two sides of the binding structure, and hanging rope structures are fixedly installed on the protection knapsack bodies. The binding structure comprises a double-shoulder strap and an extension strap extending downwards, a bottom piece is sewn at the bottom end of the extension strap, a leg penetrating opening is integrally formed in the middle section of the extension strap, a transverse stress strap is arranged on the double-shoulder strap in a penetrating mode, and limiting blocks are arranged at the two ends of the transverse stress strap.

Description

Technical Field

[0001] The present invention relates to the technical field of luggage, and particularly to a multi-functional backpack. Background Art

[0002] A backpack is a bag-shaped container for carrying items, usually made of fabric, leather or synthetic materials, with shoulder straps (single-shoulder or double-shoulder) for convenient carrying. The backpack can hold objects and is carried on the human shoulders through the shoulder straps, thus freeing the user's hands, especially suitable for sports such as cycling, effectively improving the flexibility of movement.

[0003] Although the above-mentioned prior art can solve the corresponding technical problems, there are still certain defects: when existing backpacks are carried by mountaineers, they often need to be carried for a long time, and the weight of the mountaineering equipment carried is relatively large. Since existing backpacks are fixed on the user's back through shoulder straps, when walking, the backpack will generate a pulling force on the human back in the backward and downward directions, bringing relatively high pressure to the waist, abdomen and back. The long-term carrying comfort is poor. And when the human body falls, if it falls in the direction of the backpack, the backpack will cause the human body to be lifted upwards, while the head is not lifted by the backpack, and thus it is very easy for the head to drop and hit the ground with a large force due to inertia, bringing danger to use. At the same time, the backpack can only provide the function of carrying the carried objects, and the functionality is very single. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-functional backpack with good carrying comfort, strong protection and more functions in view of the defects and deficiencies of the prior art.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A multi-functional backpack includes a binding structure and a protective backpack body fixedly sewn on the side of the binding structure. There are two protective backpack bodies, and the two protective backpack bodies are symmetrically distributed on both sides of the binding structure. A hanging rope structure is fixedly installed on the protective backpack body. The binding structure includes double shoulder straps and extension straps extending downward. The bottom end of the extension strap is sewn with a bottom piece. A leg through-hole is integrally formed in the middle section of the extension strap. A horizontally placed stress strap is threaded through the double shoulder straps, and limiting blocks are provided at both ends of the horizontally placed stress strap.

[0006] Further improvement is: An enlarged piece made of sponge material is provided in the middle section of the horizontally placed stress strap.

[0007] Further improvement is: A waist binding strap with high friction is threaded between the two protective backpack bodies, and a buckle is provided in the middle section of the waist binding strap.

[0008] Further improvements are as follows: The protective backpack body includes a backpack body and a protective airbag integrally formed within the backpack body. A protective block is provided at the top of the backpack body, and a pressure-current device is provided on the side wall of the backpack body. The pressure-current device is electrically connected to the protective block.

[0009] Further improvements are as follows: A hard plastic chassis is heat-melted and connected to the bottom of the backpack body.

[0010] Further improvements are as follows: An arc-shaped plastic sheet is provided on the outer wall of the backpack body at the corresponding position of the pressure-current device.

[0011] Further improvements are as follows: The protective block includes a hard frame embedded in the top of the backpack body and an electric igniter electrically connected to the pressure-current device and penetrating the hard frame. The hard frame is filled with sodium azide filler. A compression airbag is provided at the top of the hard frame, and a protective film is further provided on the top surface of the hard frame to cover the compression airbag. The protective film includes a film body and a wrapping layer provided at the edge of the film body and fixed to the top surface of the hard frame. A spiral sewing groove is also provided on the film body.

[0012] Further improvements are as follows: The hanging rope structure includes an outer shell and a side shell provided on one side of the outer shell. A rope winding wheel is movably engaged with the inner wall of the outer shell. A hanging rope that penetrates the outer shell and extends outward is wound around the rope winding wheel. A buckle is provided at the end of the hanging rope. A clamping plate is movably engaged with the side shell. One end of the clamping plate extends into the outer shell, and the other end of the clamping plate extends into the side shell. A heavy ball is fixedly provided at the end of the clamping plate located within the side shell.

[0013] Further improvements are as follows: The rope winding wheel includes a rope winding roller movably engaged with the inner wall of the outer shell and a rotating wheel sleeved on the outer wall of the rope winding roller. A number of locking blocks that can cooperate with the clamping plate are provided on the outer wall of the rotating wheel.

[0014] Further improvements are as follows: The locking block includes a block body fixedly provided on the outer wall of the rotating wheel and a silica gel soft pad provided on the contact side between the block body and the clamping plate. A deformation groove is integrally formed on the connection side of the clamping plate and the silica gel soft pad, and a number of anti-slip protrusions are integrally formed on the silica gel soft pad.

[0015] After adopting the above technical solutions, the beneficial effects of the present invention are as follows: The present invention disperses the pressure carried by the backpack throughout the upper body and the waist through a binding structure, thereby making the stress points more dispersed, with less force on each stress point. Moreover, protective backpack bodies are provided on both sides of the binding structure, which can not only effectively increase the backpack volume, but also make the weight more balanced front and back through two symmetrically distributed protective backpack bodies, balancing or significantly reducing the pulling force in the lower back direction on the human body, reducing the pressure on the waist, abdomen and back, and making the comfort of long-term carrying higher.

[0016] When a person falls in the present invention, the human body squeezes the pressure current device, causing the pressure current device to output current to the protection block under pressure, thereby enabling the electric igniter of the protection block to work, quickly activating and decomposing the sodium azide filler, generating a large amount of nitrogen gas quickly, and quickly expanding the compressed airbag and bursting the protective film, thereby quickly forming an airbag body that can elastically support the head to protect the human head, preventing the human head from falling and hitting the ground with a large force due to inertia, with strong protection and being more suitable for use in harsh environments such as mountain climbing.

[0017] The present invention can suspend the backpack on a fixed object such as a tree or a crossbeam of a building through a hanging rope structure, thereby achieving the purpose of descending from a height, with higher functionality. At the same time, if a fall occurs during the descent, the sudden increase in the descent speed can cooperate with the inertia of the heavy ball to make the clamping plate tilt up and be clamped into the position of the clamping block, locking the clamping block and the clamping plate and preventing the rotating wheel from rotating, thereby preventing the suspension rope from continuing to output and avoiding the user from falling further. With more functions and higher safety, it is more suitable for use in harsh environments such as mountain climbing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic structural view of the side view of the backpack of the present invention; Figure 2 It is a schematic structural view of the front cross-section of the binding structure of the present invention; Figure 3 It is a schematic structural view of the side cross-section of the protective backpack body of the present invention Figure 4 It is a schematic structural view of the front cross-section of the protection block of the present invention; Figure 5 It is a schematic top view of the protective film of the present invention; Figure 6It is a schematic structural diagram of the front view cross-section of the lanyard structure of the present invention; Figure 7 It is a schematic structural diagram of the front view cross-section of the rope winding wheel of the present invention; Figure 8 It is a schematic structural diagram of the front view cross-section of the locking block of the present invention. Detailed implementation manners

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] Refer to Figure 1-8As shown in the figure, the technical solution adopted in this specific embodiment is as follows: A multi-functional backpack includes a binding structure 1 and a protective backpack body 2 fixedly sewn on the side of the binding structure 1. The protective backpack body 2 includes a backpack body 21 and a protective airbag 26 integrally formed inside the backpack body 21. A protective block 23 is provided at the top of the backpack body 21. The protective block 23 includes a rigid frame 231 embedded in the top of the backpack body 21 and an electric igniter 232 electrically connected to a pressure current device 24 and penetrating the rigid frame 231. The rigid frame 231 is filled with a sodium azide filler 233. A compressed airbag 235 is provided at the top of the rigid frame 231. A protective film 234 covering the compressed airbag 235 is also provided on the top surface of the rigid frame 231. The protective film 234 includes a film body 32 and a border layer 31 provided at the edge of the film body 32 and fixed to the top surface of the rigid frame 231. A spiral sewing groove 33 is also provided on the film body 32. A pressure current device 24 is provided on the side wall of the backpack body 23. The pressure current device 24 is electrically connected to the protective block 23. There are two protective backpack bodies 2, and the two protective backpack bodies 2 are symmetrically distributed on both sides of the binding structure 1. A hanging rope structure 4 is fixedly installed on the protective backpack body 2. The hanging rope structure 4 includes an outer shell 41 and a side shell 42 provided on one side of the outer shell 41. A rope winding wheel 46 is movably engaged with the inner wall of the outer shell 41. The rope winding wheel 46 includes a rope winding roller 461 movably engaged with the inner wall of the outer shell 41 and a rotating wheel 462 sleeved on the outer wall of the rope winding roller 461. A number of locking blocks 463 that can cooperate with a clamping plate 43 are provided on the outer wall of the rotating wheel 462. The locking block 463 includes a block body 51 fixedly provided on the outer wall of the rotating wheel 462 and a silica gel soft pad 52 provided on the contact side between the block body 51 and the clamping plate 43. A deformation groove 53 is integrally formed on the connecting side of the clamping plate 43 and the silica gel soft pad 52. A number of anti-slip protrusions 54 are integrally formed on the silica gel soft pad 52. A suspension rope 47 that penetrates the outer shell 41 and extends outward is wound around the rope winding wheel 46. A buckle 48 is provided at the end of the suspension rope 47. A clamping plate 43 is movably engaged with the side shell 42. One end of the clamping plate 43 extends into the outer shell 41, and the other end of the clamping plate 43 extends into the side shell 42. A heavy ball 44 is fixedly provided at the end of the clamping plate 43 located inside the side shell 42. The binding structure 1 includes double shoulder straps 11 and an extension belt 15 extending downward. A bottom piece 16 is sewn at the bottom end of the extension belt 15. A leg outlet 17 is also integrally formed in the middle section of the extension belt 15. A horizontal stress belt 12 is threaded through the double shoulder straps 11. Limit blocks 13 are provided at both ends of the horizontal stress belt 12. When in use, put the items to be carried into the protective backpack body 2 so that the backpack bodies 21 of the two protective backpack bodies 2 are filled, and when loading, make the weights of the two protective backpack bodies 2 roughly the same. Then, place the backpack on the ground and let the legs pass through the leg outlet 17 of the binding structure 1.Subsequently, lift the extension strap 15 upwards so that the negative film 16 fits against the groin position of the human body, put the shoulder straps 11 on the shoulders of the human body, and make the horizontally placed load-bearing strap 12 fit against the trapezius muscle of the human body. When moving, the weight of the backpack is borne by the hip and shoulder simultaneously, and at the same time, the backpack pressure is dispersed on the surface of the human body through the friction between the extension strap 15 and the human body, thereby reducing the stress on the shoulders. At the same time, when the human body bends forward, the horizontally placed load-bearing strap 12 that fits against the trapezius muscle position of the human body is stretched and stuck on the shoulder straps 11 through the limit block 13, so that the horizontally placed load-bearing strap 12 is activated. Furthermore, the pressure of the backpack is further dispersed through the horizontally placed load-bearing strap 12, so that the weight borne by the upper body can be fully dispersed, the stress points are more dispersed, and the force received between each stress point is less. And protective backpack bodies 2 are provided on both sides of the binding structure 1, which can not only effectively increase the backpack volume, but also make the weight of the front and back more balanced through the two symmetrically distributed protective backpack bodies 2, balance or greatly reduce the pulling force in the lower rear direction on the human body, reduce the pressure on the waist, abdomen and back, and make the comfort of long-term carrying higher; When the human body has a falling phenomenon, the human body will squeeze the protective backpack body 2, and then the human body pressure is applied to the backpack body 21, resulting in the human body squeezing the pressure current device 24. At the same time, the falling impact received by the human body is slowly released and absorbed through the airbag 26. When the human body squeezes the pressure current device 24, the pressure current device 24 is pressured and outputs current to the protection block 23, and then the electric igniter 232 of the protection block 23 works. Then, the electric igniter 232 quickly generates heat and quickly activates and decomposes the sodium azide filler 233, making it quickly generate a large amount of nitrogen gas. The nitrogen gas is used to quickly fill the compressed airbag 235, so that the compressed airbag 235 is quickly expanded and breaks through the protective film 234. The protective film 234 is provided with a spiral suture groove 33, and then the film body 32 can be torn in a spiral shape, and the phenomenon that the compressed airbag 235 irregularly breaks through the film body 32 outward and is skewed is avoided. At the same time, when the film body 32 is broken by the spiral suture groove 33, it will open spirally, and the breaking speed will not be too fast to cause excessive impact on people, and an airbag body that can elastically support the head can be quickly formed to protect the head of the human body, prevent the head of the human body from falling and hitting the ground with a large force due to inertia, with strong protection, and is more suitable for use in harsh environments such as mountain climbing; Meanwhile, the backpack can be suspended on a fixed object such as a tree or a crossbeam of a building through the lanyard structure 4, so as to achieve the purpose of descending from a high place. At the same time, the safety when standing at a high place such as a mountain peak can be improved by buckling the buckle 48 of the lanyard structure 4 on a fixed object, and the functionality is higher. During use, if a sudden fall occurs, the descending speed can be suddenly increased and combined with the inertia of the heavy ball 44 to make the clamping plate 43 tilt up and snap into the position of the locking block 463, so that the locking block 463 locks with the clamping plate 43 and the rotating wheel 462 cannot rotate, thereby preventing the suspension rope 47 from continuing to output and pulling the user. At the same time, a silica gel soft pad 52 and a deformation groove 53 are provided on the clamping body 51 of the locking block 463. When the clamping plate 43 snaps in, the clamping plate 43 can be buffered by the extrusion of the silica gel soft pad 52 into the deformation groove 53, thereby preventing the clamping plate 43 from bouncing away after snapping in and preventing it from sliding after snapping in, which affects the braking effect, greatly improving the locking effect, avoiding the user from continuing to fall, having more functions and higher safety, and being more suitable for use in harsh environments such as mountain climbing; An enlarged piece 14 made of sponge material is provided in the middle section of the horizontally placed stress belt 12, which is beneficial to buffering the pressure exerted on the trapezius muscle position of the human body when the horizontally placed stress belt 12 is stressed, and further improving the carrying feeling; A waist strap 5 with high friction is threaded between the two protective backpack bodies 2. A buckle 6 is provided in the middle section of the waist strap 5, which is beneficial to improving the connection firmness between the two protective backpack bodies 2 and the human body through the waist strap 5, realizing quick release through the buckle 6, enabling the protective backpack body 2 to better fit the human body, avoiding shaking during movement, and enabling the waist to partially share the weight of the backpack through the waist strap 5, further dispersing the backpack pressure; A hard plastic chassis 22 is heat-melted and connected to the bottom of the backpack body 21, which is beneficial to making the bottom of the backpack body 21 more solid and not easily damaged, while increasing wear resistance and preventing the bottom of the backpack body 21 from having holes and being damaged; An arc-shaped plastic sheet 25 is provided on the outer wall of the backpack body 21 at the corresponding position of the pressure current device 24, which is beneficial to covering and protecting the pressure current device 24, avoiding abnormal contact with the pressure current device 24 and causing it to output current. The plastic sheet 25 can be crushed and the pressure current device 24 can be contacted and extruded only when a relatively high pressure is applied, making the use more stable.

[0022] Working principle of the present invention: When the present invention is in use, the objects to be carried are placed into the protective backpack body 2, so that the backpack bodies 21 of the two protective backpack bodies 2 are filled, and when loading, the weights of the two protective backpack bodies 2 are made approximately the same. Subsequently, the backpack is placed on the ground, and the legs pass through the leg outlets 17 of the binding structure 1. Then, the extension belt 15 is lifted to make the bottom film 16 fit the groin position of the human body, and the shoulder straps 11 are put on the shoulders of the human body, and the horizontally placed stress belt 12 is made to fit the trapezius muscle of the human body. When moving, the weight of the backpack is borne by the hip and the shoulder at the same time, and at the same time, the backpack pressure is dispersed on the surface of the human body through the friction between the extension belt 15 and the human body, thereby reducing the stress on the shoulders. At the same time, when the human body bends forward, the horizontally placed stress belt 12 that fits the trapezius muscle position of the human body is stretched and stuck on the shoulder straps 11 through the limit block 13, so that the horizontally placed stress belt 12 is activated. Furthermore, the pressure of the backpack is further dispersed through the horizontally placed stress belt 12, so that the weight borne by the upper body can be fully dispersed, the stress points are more dispersed, and the force received between each stress point is less. And protective backpack bodies 2 are provided on both sides of the binding structure 1, which can not only effectively increase the backpack volume, but also make the front and back weights more balanced through the two symmetrically distributed protective backpack bodies 2, so that the pulling force in the lower back direction received by the human body is balanced or greatly reduced, reducing the pressure on the waist, abdomen and back, and making the comfort of long-term carrying higher; When the human body has a falling phenomenon, the human body will squeeze the protective backpack body 2, and then the human body pressure is applied to the backpack body 21, resulting in the human body squeezing the pressure current device 24. At the same time, the falling impact received by the human body is slowly released and absorbed through the protective airbag 26. When the human body squeezes the pressure current device 24, the pressure current device 24 is pressured to output current to the protection block 23, and then the electric igniter 232 of the protection block 23 works. Then, the electric igniter 232 quickly generates heat and quickly activates and decomposes the sodium azide filler 233, so that it quickly generates a large amount of nitrogen gas. The compressed airbag 235 is quickly filled with nitrogen gas, so that the compressed airbag 235 is quickly expanded and breaks through the protective film piece 234. The protective film piece 234 is provided with a spiral-shaped suture groove 33, so that the film body 32 can be torn in a spiral shape, and the phenomenon that the compressed airbag 235 irregularly breaks through the film body 32 outward and is skewed is avoided. At the same time, when the film body 32 is broken by the spiral-shaped suture groove 33, it will be opened in a spiral shape, and the breaking speed will not be too fast to cause excessive impact on people, and an airbag body that can elastically support the head can be quickly formed to protect the head of the human body, preventing the human head from falling and hitting the ground with a large force due to inertia. It has strong protection and is more suitable for use in harsh environments such as mountain climbing; Meanwhile, the backpack can be suspended on a fixed object such as a beam of a tree or a building through the lanyard structure 4, so as to achieve the purpose of descending from a high place. At the same time, the safety when standing at a high place such as a mountain peak can be improved by buckling the buckle 48 of the lanyard structure 4 on a fixed object, and the functionality is higher. Meanwhile, if a sudden fall occurs during use, the falling speed can be suddenly increased to cooperate with the inertia of the heavy ball 44 to make the clamping plate 43 tilt up and be clamped into the position of the locking block 463, so that the locking block 463 is locked with the clamping plate 43 and the rotating wheel 462 cannot rotate, thereby preventing the suspension rope 47 from continuing to output and pulling the user. At the same time, a silica gel soft pad 52 and a deformation groove 53 are provided on the clamping body 51 of the locking block 463. When the clamping plate 43 is clamped, the clamping plate 43 can be buffered by the handle squeezing the silica gel soft pad 52 into the deformation groove 53, thereby preventing the clamping plate 43 from bouncing away after being clamped and preventing it from sliding after being clamped, which affects the braking effect, greatly improving the locking effect, avoiding the user from falling further, having more functions and higher safety, and being more suitable for use in harsh environments such as mountain climbing.

[0023] What the present invention aims to protect is the structure of the product. The models of each component are not the content protected by the present invention and are also well-known technologies. As long as the components that can achieve the above functions of the present invention are available on the market, they can be selected and applied. Therefore, the parameters such as the models of the components are not described in detail in the present invention. The contribution of the present invention lies in the scientific combination of each component.

[0024] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and descriptions only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents. Where the present invention is not described in detail, it is all well-known technology to those skilled in the art.

Claims

1. A multifunctional backpack, characterized in that: The invention comprises a binding structure (1) and a protective backpack body (2) fixedly sewn to the side of the binding structure (1), wherein two protective backpack bodies (2) are provided, and the two protective backpack bodies (2) are symmetrically distributed on both sides of the binding structure (1), and a hanging rope structure (4) is fixedly installed on the protective backpack body (2), and the binding structure (1) comprises a pair of shoulder straps (11) and an extension belt (15) extending downward, a bottom film (16) is sewn on the bottom end of the extension belt (15), and a leg through hole (17) is integrally formed in the middle section of the extension belt (15), and a transverse force-bearing belt (12) is passed through the pair of shoulder straps (11), and limit blocks (13) are provided at both ends of the transverse force-bearing belt (12).

2. A multifunctional backpack according to claim 1, characterized in that: An expansion piece (14) made of sponge material is provided in the middle section of the transverse force-bearing belt (12).

3. The multifunctional backpack according to claim 1, characterized in that: A waist strap (5) with high friction is provided between the two protective backpack bodies (2), and a buckle (6) is provided in the middle section of the waist strap (5).

4. The multifunctional backpack according to claim 1, characterized in that: The protective backpack body (2) comprises a backpack body (21) and a protective airbag (26) integrally formed in the backpack body (21); a protective block (23) is provided on the top of the backpack body (21); a pressure current meter (24) is provided on the side wall of the backpack body (23); and the pressure current meter (24) is electrically connected to the protective block (23).

5. The multifunctional backpack according to claim 4, characterized in that: The bottom of the backpack body (21) is hot-melt-connected with a hard plastic chassis (22).

6. The multifunctional backpack according to claim 4, characterized in that: An arc-shaped plastic sheet (25) is provided on the outer wall of the backpack body (21) at a position corresponding to the pressure current sensor (24).

7. The multifunctional backpack according to claim 4, characterized in that: The protective block (23) comprises a hard frame (231) embedded in the top of the backpack body (21) and an electric igniter (232) electrically connected to the pressure current meter (24) and penetrating the hard frame (231); the hard frame (231) is filled with a sodium azide filler (233); a compressed air bag (235) is provided on the top of the hard frame (231); a protective diaphragm (234) covering the compressed air bag (235) is also provided on the top surface of the hard frame (231); the protective diaphragm (234) comprises a diaphragm body (32) and an edge layer (31) arranged at the edge of the diaphragm body (32) and fixed to the top surface of the hard frame (231); and a spiral suture groove (33) is also provided on the diaphragm body (32).

8. The multifunctional backpack according to claim 1, characterized in that: The hanging rope structure (4) comprises an outer shell (41) and a side shell (42) arranged on one side of the outer shell (41); a rope reel (46) is movably engaged with the inner wall of the outer shell (41); a hanging rope (47) is wound around the rope reel (46) and penetrates the outer shell (41) and extends outward; a buckle (48) is provided at the end of the hanging rope (47); a snap-in plate (43) is movably engaged with the side shell (42); one end of the snap-in plate (43) extends into the outer shell (41); the other end of the snap-in plate (43) extends into the side shell (42); a heavy ball (44) is fixedly provided on the end of the snap-in plate (43) located in the side shell (42).

9. The multifunctional backpack according to claim 8, characterized in that: The rope winding wheel (46) comprises a rope winding roller (461) movably engaged with the inner wall of the outer shell (41) and a rotating wheel (462) sleeved on the outer wall of the rope winding roller (461), and the outer wall of the rotating wheel (462) is provided with a plurality of locking blocks (463) that can cooperate with the locking plate (43).

10. The multifunctional backpack according to claim 9, characterized in that: The locking block (463) comprises a locking block body (51) fixedly arranged on the outer wall of the rotating wheel (462) and a silicone soft pad (52) arranged on the contact side of the locking block body (51) and the locking plate (43), a deformation groove (53) is integrally formed on the connection side between the locking plate (43) and the silicone soft pad (52), and a plurality of anti-slip protrusions (54) are integrally formed on the silicone soft pad (52).

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